Vulnerabilities > CVE-2015-7854 - Classic Buffer Overflow vulnerability in NTP
Attack vector
NETWORK Attack complexity
LOW Privileges required
SINGLE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
PARTIAL Summary
Buffer overflow in the password management functionality 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 (daemon crash) or possibly execute arbitrary code via a crafted key file.
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.
- Overflow Buffers Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
- Client-side Injection-induced Buffer Overflow This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
- Filter Failure through Buffer Overflow In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
- MIME Conversion An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.
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 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 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 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 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 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)
Talos
| id | TALOS-2015-0065 |
| last seen | 2019-05-29 |
| published | 2015-10-21 |
| reporter | Talos Intelligence |
| source | http://www.talosintelligence.com/vulnerability_reports/TALOS-2015-0065 |
| title | Network Time Protocol Password Length Memory Corruption Vulnerability |