Vulnerabilities > CVE-2015-7855 - Improper Input Validation vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
SINGLE Confidentiality impact
NONE Integrity impact
NONE Availability impact
PARTIAL Summary
The decodenetnum function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (assertion failure) via a 6 or mode 7 packet containing a long data value.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Buffer Overflow via Environment Variables This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
- Server Side Include (SSI) Injection An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
- Cross Zone Scripting An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
- Cross Site Scripting through Log Files An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
- Command Line Execution through SQL Injection An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.
Exploit-Db
description | NTP 4.2.8p3 - Denial of Service. CVE-2015-7855. Dos exploit for Linux platform |
file | exploits/linux/dos/40840.py |
id | EDB-ID:40840 |
last seen | 2016-11-28 |
modified | 2016-11-28 |
platform | linux |
port | |
published | 2016-11-28 |
reporter | Exploit-DB |
source | https://www.exploit-db.com/download/40840/ |
title | NTP 4.2.8p3 - Denial of Service |
type | dos |
Nessus
NASL family SuSE Local Security Checks NASL id OPENSUSE-2016-649.NASL description This update for ntp fixes the following issues : - Update to 4.2.8p7 (boo#977446) : - CVE-2016-1547, boo#977459: Validate crypto-NAKs, AKA: CRYPTO-NAK DoS. - CVE-2016-1548, boo#977461: Interleave-pivot - CVE-2016-1549, boo#977451: Sybil vulnerability: ephemeral association attack. - CVE-2016-1550, boo#977464: Improve NTP security against buffer comparison timing attacks. - CVE-2016-1551, boo#977450: Refclock impersonation vulnerability - CVE-2016-2516, boo#977452: Duplicate IPs on unconfig directives will cause an assertion botch in ntpd. - CVE-2016-2517, boo#977455: remote configuration trustedkey/ requestkey/controlkey values are not properly validated. - CVE-2016-2518, boo#977457: Crafted addpeer with hmode > 7 causes array wraparound with MATCH_ASSOC. - CVE-2016-2519, boo#977458: ctl_getitem() return value not always checked. - integrate ntp-fork.patch - Improve the fixes for: CVE-2015-7704, CVE-2015-7705, CVE-2015-7974 - Restrict the parser in the startup script to the first occurrance of last seen 2020-06-05 modified 2016-06-01 plugin id 91403 published 2016-06-01 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/91403 title openSUSE Security Update : ntp (openSUSE-2016-649) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1719.NASL description According to the versions of the ntp packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - The rate limiting feature in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to have unspecified impact via a large number of crafted requests. - Mitigation:Do not add the last seen 2020-05-06 modified 2019-07-22 plugin id 126847 published 2019-07-22 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/126847 title EulerOS 2.0 SP2 : ntp (EulerOS-SA-2019-1719) NASL family Misc. NASL id NTP_4_2_8P4.NASL description The version of the remote NTP server is 3.x or 4.x prior to 4.2.8p4. It is, therefore, affected by the following vulnerabilities : - A flaw exists in the ntp_crypto.c file due to improper validation of the last seen 2020-06-01 modified 2020-06-02 plugin id 86631 published 2015-10-28 reporter This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/86631 title Network Time Protocol Daemon (ntpd) 3.x / 4.x < 4.2.8p4 Multiple Vulnerabilities NASL family AIX Local Security Checks NASL id AIX_IV79946.NASL description Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in the sntp program. By sending specially crafted NTP packets, a remote attacker from within the local network could exploit this vulnerability to cause the application to enter into an infinite loop. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in ntp_crypto.c. An attacker could exploit this vulnerability using a packet containing an extension field with an invalid value for the length of its value field to cause ntpd to crash. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in ntp_crypto.c. An attacker could exploit this vulnerability using a packet containing an extension field with an invalid value for the length of its value field to cause ntpd to crash. Network Time Protocol (NTP) could allow a remote attacker to obtain sensitive information, caused by a memory leak in CRYPTO_ASSOC. An attacker could exploit this vulnerability to obtain sensitive information. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in ntp_crypto.c. An attacker could exploit this vulnerability using a packet containing an extension field with an invalid value for the length of its value field to cause ntpd to crash. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in the remote configuration functionality. By sending a specially crafted configuration file, an attacker could exploit this vulnerability to cause the application to enter into an infinite loop. Network Time Protocol (NTP) is vulnerable to a buffer overflow, caused by improper bounds checking by the refclock of ntpd. By sending an overly long string, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by ASSERT botch instead of returning FAIL on some invalid values by the decodenetnum() function. An attacker could exploit this vulnerability to cause a denial of service. This plugin has been deprecated to better accommodate iFix supersedence with replacement plugin aix_ntp_v3_advisory4.nasl (plugin id 102321). last seen 2017-10-29 modified 2017-08-09 plugin id 88059 published 2016-01-22 reporter Tenable source https://www.tenable.com/plugins/index.php?view=single&id=88059 title AIX 5.3 TL 12 : ntp (IV79946) (deprecated) NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_C4A18A1277FC11E5A687206A8A720317.NASL description ntp.org reports : NTF last seen 2020-06-01 modified 2020-06-02 plugin id 86519 published 2015-10-22 reporter This script is Copyright (C) 2015-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/86519 title FreeBSD : ntp -- 13 low- and medium-severity vulnerabilities (c4a18a12-77fc-11e5-a687-206a8a720317) NASL family SuSE Local Security Checks NASL id SUSE_SU-2016-1247-1.NASL description ntp was updated to version 4.2.8p6 to fix 28 security issues. Major functional changes : - The last seen 2020-06-01 modified 2020-06-02 plugin id 90991 published 2016-05-09 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/90991 title SUSE SLED12 / SLES12 Security Update : ntp (SUSE-SU-2016:1247-1) NASL family AIX Local Security Checks NASL id AIX_IV79945.NASL description Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in the sntp program. By sending specially crafted NTP packets, a remote attacker from within the local network could exploit this vulnerability to cause the application to enter into an infinite loop. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in ntp_crypto.c. An attacker could exploit this vulnerability using a packet containing an extension field with an invalid value for the length of its value field to cause ntpd to crash. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in ntp_crypto.c. An attacker could exploit this vulnerability using a packet containing an extension field with an invalid value for the length of its value field to cause ntpd to crash. Network Time Protocol (NTP) could allow a remote attacker to obtain sensitive information, caused by a memory leak in CRYPTO_ASSOC. An attacker could exploit this vulnerability to obtain sensitive information. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in ntp_crypto.c. An attacker could exploit this vulnerability using a packet containing an extension field with an invalid value for the length of its value field to cause ntpd to crash. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in the remote configuration functionality. By sending a specially crafted configuration file, an attacker could exploit this vulnerability to cause the application to enter into an infinite loop. Network Time Protocol (NTP) is vulnerable to a buffer overflow, caused by improper bounds checking by the refclock of ntpd. By sending an overly long string, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by ASSERT botch instead of returning FAIL on some invalid values by the decodenetnum() function. An attacker could exploit this vulnerability to cause a denial of service. This plugin has been deprecated to better accommodate iFix supersedence with replacement plugin aix_ntp_v3_advisory4.nasl (plugin id 102321). last seen 2017-10-29 modified 2017-08-09 plugin id 88058 published 2016-01-22 reporter Tenable source https://www.tenable.com/plugins/index.php?view=single&id=88058 title AIX 7.2 TL 0 : ntp (IV79945) (deprecated) NASL family Slackware Local Security Checks NASL id SLACKWARE_SSA_2015-302-03.NASL description New ntp packages are available for Slackware 13.0, 13.1, 13.37, 14.0, 14.1, and -current to fix security issues. last seen 2020-06-01 modified 2020-06-02 plugin id 86664 published 2015-10-30 reporter This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/86664 title Slackware 13.0 / 13.1 / 13.37 / 14.0 / 14.1 / current : ntp (SSA:2015-302-03) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201607-15.NASL description The remote host is affected by the vulnerability described in GLSA-201607-15 (NTP: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in NTP. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could possibly cause a Denial of Service condition. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 92485 published 2016-07-21 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/92485 title GLSA-201607-15 : NTP: Multiple vulnerabilities NASL family SuSE Local Security Checks NASL id SUSE_SU-2015-2058-1.NASL description This ntp update provides the following security and non security fixes : - Update to 4.2.8p4 to fix several security issues (bsc#951608) : - CVE-2015-7871: NAK to the Future: Symmetric association authentication bypass via crypto-NAK - CVE-2015-7855: decodenetnum() will ASSERT botch instead of returning FAIL on some bogus values - CVE-2015-7854: Password Length Memory Corruption Vulnerability - CVE-2015-7853: Invalid length data provided by a custom refclock driver could cause a buffer overflow - CVE-2015-7852 ntpq atoascii() Memory Corruption Vulnerability - CVE-2015-7851 saveconfig Directory Traversal Vulnerability - CVE-2015-7850 remote config logfile-keyfile - CVE-2015-7849 trusted key use-after-free - CVE-2015-7848 mode 7 loop counter underrun - CVE-2015-7701 Slow memory leak in CRYPTO_ASSOC - CVE-2015-7703 configuration directives last seen 2020-06-01 modified 2020-06-02 plugin id 87010 published 2015-11-23 reporter This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/87010 title SUSE SLED11 / SLES11 Security Update : ntp (SUSE-SU-2015:2058-1) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1230.NASL description According to the versions of the ntp packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - The ntpq saveconfig command in NTP 4.1.2, 4.2.x before 4.2.8p6, 4.3, 4.3.25, 4.3.70, and 4.3.77 does not properly filter special characters, which allows attackers to cause unspecified impact via a crafted filename.i1/4^CVE-2015-7976i1/4%0 - ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote authenticated users to cause a denial of service (infinite loop or crash) by pointing the key file at the log file.i1/4^CVE-2015-7850i1/4%0 - The decodenetnum function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (assertion failure) via a 6 or mode 7 packet containing a long data value.i1/4^CVE-2015-7855i1/4%0 Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-19 modified 2019-04-04 plugin id 123698 published 2019-04-04 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123698 title EulerOS Virtualization 2.5.3 : ntp (EulerOS-SA-2019-1230) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-2066.NASL description According to the versions of the ntp packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - The rate limiting feature in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to have unspecified impact via a large number of crafted requests. - Mitigation:Do not add the last seen 2020-05-08 modified 2019-09-24 plugin id 129259 published 2019-09-24 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/129259 title EulerOS 2.0 SP3 : ntp (EulerOS-SA-2019-2066) NASL family Firewalls NASL id PFSENSE_SA-15_08.NASL description According to its self-reported version number, the remote pfSense install is prior to 2.2.5. It is, therefore, affected by multiple vulnerabilities as stated in the referenced vendor advisories. last seen 2020-06-01 modified 2020-06-02 plugin id 106497 published 2018-01-31 reporter This script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/106497 title pfSense < 2.2.5 Multiple Vulnerabilities (SA-15_08) NASL family SuSE Local Security Checks NASL id SUSE_SU-2016-1311-1.NASL description This network time protocol server ntp was updated to 4.2.8p6 to fix the following issues : Also yast2-ntp-client was updated to match some sntp syntax changes. (bsc#937837) Major functional changes : - The last seen 2020-06-01 modified 2020-06-02 plugin id 91248 published 2016-05-19 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/91248 title SUSE SLES11 Security Update : ntp (SUSE-SU-2016:1311-1) NASL family SuSE Local Security Checks NASL id OPENSUSE-2015-767.NASL description This ntp update provides the following security and non security fixes : - Update to 4.2.8p4 to fix several security issues (bsc#951608) : - CVE-2015-7871: NAK to the Future: Symmetric association authentication bypass via crypto-NAK - CVE-2015-7855: decodenetnum() will ASSERT botch instead of returning FAIL on some bogus values - CVE-2015-7854: Password Length Memory Corruption Vulnerability - CVE-2015-7853: Invalid length data provided by a custom refclock driver could cause a buffer overflow - CVE-2015-7852 ntpq atoascii() Memory Corruption Vulnerability - CVE-2015-7851 saveconfig Directory Traversal Vulnerability - CVE-2015-7850 remote config logfile-keyfile - CVE-2015-7849 trusted key use-after-free - CVE-2015-7848 mode 7 loop counter underrun - CVE-2015-7701 Slow memory leak in CRYPTO_ASSOC - CVE-2015-7703 configuration directives last seen 2020-06-05 modified 2015-11-20 plugin id 86964 published 2015-11-20 reporter This script is Copyright (C) 2015-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/86964 title openSUSE Security Update : ntp (openSUSE-2015-767) NASL family AIX Local Security Checks NASL id AIX_NTP_V3_ADVISORY4.NASL description The remote AIX host has a version of Network Time Protocol (NTP) installed that is affected by the following vulnerabilities : - A divide-by-zero error exists in file include/ntp.h when handling LOGTOD and ULOGTOD macros in a crafted NTP packet. An unauthenticated, remote attacker can exploit this, via crafted NTP packets, to crash ntpd. (CVE 2015-5219) - A flaw exists in the ntp_crypto.c file due to improper validation of the last seen 2020-06-01 modified 2020-06-02 plugin id 102321 published 2017-08-09 reporter This script is Copyright (C) 2017-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/102321 title AIX NTP v3 Advisory : ntp_advisory4.asc (IV79942) (IV79943) (IV79944) (IV79945) (IV79946) NASL family Debian Local Security Checks NASL id DEBIAN_DLA-335.NASL description Several security issues where found in ntp : CVE-2015-5146 A flaw was found in the way ntpd processed certain remote configuration packets. An attacker could use a specially crafted package to cause ntpd to crash if : - ntpd enabled remote configuration - The attacker had the knowledge of the configuration password - The attacker had access to a computer entrusted to perform remote configuration Note that remote configuration is disabled by default in NTP. CVE-2015-5194 It was found that ntpd could crash due to an uninitialized variable when processing malformed logconfig configuration commands. CVE-2015-5195 It was found that ntpd exits with a segmentation fault when a statistics type that was not enabled during compilation (e.g. timingstats) is referenced by the statistics or filegen configuration command CVE-2015-5219 It was discovered that sntp program would hang in an infinite loop when a crafted NTP packet was received, related to the conversion of the precision value in the packet to double. CVE-2015-5300 It was found that ntpd did not correctly implement the -g option: Normally, ntpd exits with a message to the system log if the offset exceeds the panic threshold, which is 1000 s by default. This option allows the time to be set to any value without restriction; however, this can happen only once. If the threshold is exceeded after that, ntpd will exit with a message to the system log. This option can be used with the -q and -x options. ntpd could actually step the clock multiple times by more than the panic threshold if its clock discipline doesn last seen 2020-03-17 modified 2015-10-29 plugin id 86640 published 2015-10-29 reporter This script is Copyright (C) 2015-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/86640 title Debian DLA-335-1 : ntp security update NASL family SuSE Local Security Checks NASL id SUSE_SU-2016-1912-1.NASL description NTP was updated to version 4.2.8p8 to fix several security issues and to ensure the continued maintainability of the package. These security issues were fixed : CVE-2016-4953: Bad authentication demobilized ephemeral associations (bsc#982065). CVE-2016-4954: Processing spoofed server packets (bsc#982066). CVE-2016-4955: Autokey association reset (bsc#982067). CVE-2016-4956: Broadcast interleave (bsc#982068). CVE-2016-4957: CRYPTO_NAK crash (bsc#982064). CVE-2016-1547: Validate crypto-NAKs to prevent ACRYPTO-NAK DoS (bsc#977459). CVE-2016-1548: Prevent the change of time of an ntpd client or denying service to an ntpd client by forcing it to change from basic client/server mode to interleaved symmetric mode (bsc#977461). CVE-2016-1549: Sybil vulnerability: ephemeral association attack (bsc#977451). CVE-2016-1550: Improve security against buffer comparison timing attacks (bsc#977464). CVE-2016-1551: Refclock impersonation vulnerability (bsc#977450)y CVE-2016-2516: Duplicate IPs on unconfig directives could have caused an assertion botch in ntpd (bsc#977452). CVE-2016-2517: Remote configuration trustedkey/ requestkey/controlkey values are not properly validated (bsc#977455). CVE-2016-2518: Crafted addpeer with hmode > 7 causes array wraparound with MATCH_ASSOC (bsc#977457). CVE-2016-2519: ctl_getitem() return value not always checked (bsc#977458). CVE-2015-8158: Potential Infinite Loop in ntpq (bsc#962966). CVE-2015-8138: Zero Origin Timestamp Bypass (bsc#963002). CVE-2015-7979: Off-path Denial of Service (DoS) attack on authenticated broadcast mode (bsc#962784). CVE-2015-7978: Stack exhaustion in recursive traversal of restriction list (bsc#963000). CVE-2015-7977: reslist NULL pointer dereference (bsc#962970). CVE-2015-7976: ntpq saveconfig command allowed dangerous characters in filenames (bsc#962802). CVE-2015-7975: nextvar() missing length check (bsc#962988). CVE-2015-7974: NTP did not verify peer associations of symmetric keys when authenticating packets, which might have allowed remote attackers to conduct impersonation attacks via an arbitrary trusted key, aka a last seen 2020-06-01 modified 2020-06-02 plugin id 93186 published 2016-08-29 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/93186 title SUSE SLES10 Security Update : ntp (SUSE-SU-2016:1912-1) NASL family AIX Local Security Checks NASL id AIX_IV79944.NASL description Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in the sntp program. By sending specially crafted NTP packets, a remote attacker from within the local network could exploit this vulnerability to cause the application to enter into an infinite loop. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in ntp_crypto.c. An attacker could exploit this vulnerability using a packet containing an extension field with an invalid value for the length of its value field to cause ntpd to crash. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in ntp_crypto.c. An attacker could exploit this vulnerability using a packet containing an extension field with an invalid value for the length of its value field to cause ntpd to crash. Network Time Protocol (NTP) could allow a remote attacker to obtain sensitive information, caused by a memory leak in CRYPTO_ASSOC. An attacker could exploit this vulnerability to obtain sensitive information. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in ntp_crypto.c. An attacker could exploit this vulnerability using a packet containing an extension field with an invalid value for the length of its value field to cause ntpd to crash. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in the remote configuration functionality. By sending a specially crafted configuration file, an attacker could exploit this vulnerability to cause the application to enter into an infinite loop. Network Time Protocol (NTP) is vulnerable to a buffer overflow, caused by improper bounds checking by the refclock of ntpd. By sending an overly long string, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by ASSERT botch instead of returning FAIL on some invalid values by the decodenetnum() function. An attacker could exploit this vulnerability to cause a denial of service. This plugin has been deprecated to better accommodate iFix supersedence with replacement plugin aix_ntp_v3_advisory4.nasl (plugin id 102321). last seen 2017-10-29 modified 2017-08-09 plugin id 88057 published 2016-01-22 reporter Tenable source https://www.tenable.com/plugins/index.php?view=single&id=88057 title AIX 7.1 TL 4 : ntp (IV79944) (deprecated) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-2783-1.NASL description Aleksis Kauppinen discovered that NTP incorrectly handled certain remote config packets. In a non-default configuration, a remote authenticated attacker could possibly use this issue to cause NTP to crash, resulting in a denial of service. (CVE-2015-5146) Miroslav Lichvar discovered that NTP incorrectly handled logconfig directives. In a non-default configuration, a remote authenticated attacker could possibly use this issue to cause NTP to crash, resulting in a denial of service. (CVE-2015-5194) Miroslav Lichvar discovered that NTP incorrectly handled certain statistics types. In a non-default configuration, a remote authenticated attacker could possibly use this issue to cause NTP to crash, resulting in a denial of service. (CVE-2015-5195) Miroslav Lichvar discovered that NTP incorrectly handled certain file paths. In a non-default configuration, a remote authenticated attacker could possibly use this issue to cause NTP to crash, resulting in a denial of service, or overwrite certain files. (CVE-2015-5196, CVE-2015-7703) Miroslav Lichvar discovered that NTP incorrectly handled certain packets. A remote attacker could possibly use this issue to cause NTP to hang, resulting in a denial of service. (CVE-2015-5219) Aanchal Malhotra, Isaac E. Cohen, and Sharon Goldberg discovered that NTP incorrectly handled restarting after hitting a panic threshold. A remote attacker could possibly use this issue to alter the system time on clients. (CVE-2015-5300) It was discovered that NTP incorrectly handled autokey data packets. A remote attacker could possibly use this issue to cause NTP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2015-7691, CVE-2015-7692, CVE-2015-7702) It was discovered that NTP incorrectly handled memory when processing certain autokey messages. A remote attacker could possibly use this issue to cause NTP to consume memory, resulting in a denial of service. (CVE-2015-7701) Aanchal Malhotra, Isaac E. Cohen, and Sharon Goldberg discovered that NTP incorrectly handled rate limiting. A remote attacker could possibly use this issue to cause clients to stop updating their clock. (CVE-2015-7704, CVE-2015-7705) Yves Younan discovered that NTP incorrectly handled logfile and keyfile directives. In a non-default configuration, a remote authenticated attacker could possibly use this issue to cause NTP to enter a loop, resulting in a denial of service. (CVE-2015-7850) Yves Younan and Aleksander Nikolich discovered that NTP incorrectly handled ascii conversion. A remote attacker could possibly use this issue to cause NTP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2015-7852) Yves Younan discovered that NTP incorrectly handled reference clock memory. A malicious refclock could possibly use this issue to cause NTP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2015-7853) John D last seen 2020-06-01 modified 2020-06-02 plugin id 86630 published 2015-10-28 reporter Ubuntu Security Notice (C) 2015-2019 Canonical, Inc. / NASL script (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/86630 title Ubuntu 12.04 LTS / 14.04 LTS / 15.04 / 15.10 : ntp vulnerabilities (USN-2783-1) NASL family F5 Networks Local Security Checks NASL id F5_BIGIP_SOL17515.NASL description The decodenetnum function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (assertion failure) via a 6 or mode 7 packet containing a long data value. (CVE-2015-7855) Impact A locally authenticated user may be able to disrupt ntpd functionality with a specially crafted packet. last seen 2020-06-01 modified 2020-06-02 plugin id 91330 published 2016-05-26 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/91330 title F5 Networks BIG-IP : NTP vulnerability (K17515) NASL family AIX Local Security Checks NASL id AIX_IV79942.NASL description Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in the sntp program. By sending specially crafted NTP packets, a remote attacker from within the local network could exploit this vulnerability to cause the application to enter into an infinite loop. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in ntp_crypto.c. An attacker could exploit this vulnerability using a packet containing an extension field with an invalid value for the length of its value field to cause ntpd to crash. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in ntp_crypto.c. An attacker could exploit this vulnerability using a packet containing an extension field with an invalid value for the length of its value field to cause ntpd to crash. Network Time Protocol (NTP) could allow a remote attacker to obtain sensitive information, caused by a memory leak in CRYPTO_ASSOC. An attacker could exploit this vulnerability to obtain sensitive information. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in ntp_crypto.c. An attacker could exploit this vulnerability using a packet containing an extension field with an invalid value for the length of its value field to cause ntpd to crash. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an error in the remote configuration functionality. By sending a specially crafted configuration file, an attacker could exploit this vulnerability to cause the application to enter into an infinite loop. Network Time Protocol (NTP) is vulnerable to a buffer overflow, caused by improper bounds checking by the refclock of ntpd. By sending an overly long string, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash. Network Time Protocol (NTP) is vulnerable to a denial of service, caused by ASSERT botch instead of returning FAIL on some invalid values by the decodenetnum() function. An attacker could exploit this vulnerability to cause a denial of service. This plugin has been deprecated to better accommodate iFix supersedence with replacement plugin aix_ntp_v3_advisory4.nasl (plugin id 102321). last seen 2017-10-29 modified 2017-08-09 plugin id 88055 published 2016-01-22 reporter Tenable source https://www.tenable.com/plugins/index.php?view=single&id=88055 title AIX 6.1 TL 9 : ntp (IV79942) (deprecated) NASL family AIX Local Security Checks NASL id AIX_IV79943.NASL description The remote AIX host has a version of Network Time Protocol (NTP) installed that is affected by the following vulnerabilities : - A divide-by-zero error exists in file include/ntp.h when handling LOGTOD and ULOGTOD macros in a crafted NTP packet. An unauthenticated, remote attacker can exploit this, via crafted NTP packets, to crash ntpd. (CVE 2015-5219) - A flaw exists in the ntp_crypto.c file due to improper validation of the 'vallen' value in extension fields. An unauthenticated, remote attacker can exploit this, via specially crafted autokey packets, to disclose sensitive information or cause a denial of service. (CVE-2015-7691) - A denial of service vulnerability exists in the autokey functionality due to a failure in the crypto_bob2(), crypto_bob3(), and cert_sign() functions to properly validate the 'vallen' value. An unauthenticated, remote attacker can exploit this, via specially crafted autokey packets, to crash the NTP service. (CVE-2015-7692) - A denial of service vulnerability exists in the crypto_recv() function in the file ntp_crypto.c related to autokey functionality. An unauthenticated, remote attacker can exploit this, via an ongoing flood of NTPv4 autokey requests, to exhaust memory resources. (CVE-2015-7701) - A denial of service vulnerability exists due to improper validation of packets containing certain autokey operations. An unauthenticated, remote attacker can exploit this, via specially crafted autokey packets, to crash the NTP service. (CVE-2015-7702) - A denial of service vulnerability exists due to a logic flaw in the authreadkeys() function in the file authreadkeys.c when handling extended logging where the log and key files are set to be the same file. An authenticated, remote attacker can exploit this, via a crafted set of remote configuration requests, to cause the NTP service to stop responding. (CVE-2015-7850) - A overflow condition exists in the read_refclock_packet() function in the file ntp_io.c when handling negative data lengths. A local attacker can exploit this to crash the NTP service or possibly gain elevated privileges. (CVE-2015-7853) - A denial of service vulnerability exists due to an assertion flaw in the decodenetnum() function in the file decodenetnum.c when handling long data values in mode 6 and 7 packets. An unauthenticated, remote attacker can exploit this to crash the NTP service. (CVE-2015-7855) This plugin has been deprecated to better accommodate iFix supersedence with replacement plugin aix_ntp_v3_advisory4.nasl (plugin id 102321). last seen 2018-06-12 modified 2018-06-11 plugin id 88056 published 2016-01-22 reporter Tenable source https://www.tenable.com/plugins/index.php?view=single&id=88056 title AIX 7.1 TL 3 : ntp (IV79943) (deprecated) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1557.NASL description According to the versions of the ntp packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - It was found that ntpd did not check whether a Message Authentication Code (MAC) was present in a received packet when ntpd was configured to use symmetric cryptographic keys. A man-in-the-middle attacker could use this flaw to send crafted packets that would be accepted by a client or a peer without the attacker knowing the symmetric key.(CVE-2015-1798) - A missing return statement in the receive() function could potentially allow a remote attacker to bypass NTP last seen 2020-06-01 modified 2020-06-02 plugin id 125010 published 2019-05-14 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/125010 title EulerOS Virtualization 3.0.1.0 : ntp (EulerOS-SA-2019-1557) NASL family AIX Local Security Checks NASL id AIX_NTP_V4_ADVISORY4.NASL description The remote AIX host has a version of Network Time Protocol (NTP) installed that is affected by the following vulnerabilities : - A divide-by-zero error exists in file include/ntp.h when handling LOGTOD and ULOGTOD macros in a crafted NTP packet. An unauthenticated, remote attacker can exploit this, via crafted NTP packets, to crash ntpd. (CVE 2015-5219) - A flaw exists in the ntp_crypto.c file due to improper validation of the last seen 2020-06-01 modified 2020-06-02 plugin id 102322 published 2017-08-09 reporter This script is Copyright (C) 2017-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/102322 title AIX NTP v4 Advisory : ntp_advisory4.asc (IV79954) (IV79954) NASL family Debian Local Security Checks NASL id DEBIAN_DSA-3388.NASL description Several vulnerabilities were discovered in the Network Time Protocol daemon and utility programs : - CVE-2015-5146 A flaw was found in the way ntpd processed certain remote configuration packets. An attacker could use a specially crafted package to cause ntpd to crash if : - ntpd enabled remote configuration - The attacker had the knowledge of the configuration password - The attacker had access to a computer entrusted to perform remote configuration Note that remote configuration is disabled by default in NTP. - CVE-2015-5194 It was found that ntpd could crash due to an uninitialized variable when processing malformed logconfig configuration commands. - CVE-2015-5195 It was found that ntpd exits with a segmentation fault when a statistics type that was not enabled during compilation (e.g. timingstats) is referenced by the statistics or filegen configuration command. - CVE-2015-5219 It was discovered that sntp program would hang in an infinite loop when a crafted NTP packet was received, related to the conversion of the precision value in the packet to double. - CVE-2015-5300 It was found that ntpd did not correctly implement the -g option : Normally, ntpd exits with a message to the system log if the offset exceeds the panic threshold, which is 1000 s by default. This option allows the time to be set to any value without restriction; however, this can happen only once. If the threshold is exceeded after that, ntpd will exit with a message to the system log. This option can be used with the -q and -x options. ntpd could actually step the clock multiple times by more than the panic threshold if its clock discipline doesn last seen 2020-06-01 modified 2020-06-02 plugin id 86682 published 2015-11-02 reporter This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/86682 title Debian DSA-3388-1 : ntp - security update
Packetstorm
data source | https://packetstormsecurity.com/files/download/139925/ntp428p3-dos.txt |
id | PACKETSTORM:139925 |
last seen | 2016-12-05 |
published | 2016-11-25 |
reporter | Magnus Klaaborg Stubman |
source | https://packetstormsecurity.com/files/139925/NTP-4.2.8p3-Denial-Of-Service.html |
title | NTP 4.2.8p3 Denial Of Service |
References
- http://support.ntp.org/bin/view/Main/NtpBug2922
- http://www.debian.org/security/2015/dsa-3388
- http://www.securityfocus.com/bid/77283
- http://www.securitytracker.com/id/1033951
- https://bugzilla.redhat.com/show_bug.cgi?id=1274264
- https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05270839
- https://security.gentoo.org/glsa/201607-15
- https://security.netapp.com/advisory/ntap-20171004-0001/
- https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11
- https://www.exploit-db.com/exploits/40840/