Vulnerabilities > CVE-2015-7849 - Use After Free vulnerability in NTP
Attack vector
NETWORK Attack complexity
LOW Privileges required
SINGLE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
PARTIAL Summary
Use-after-free vulnerability in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote authenticated users to possibly execute arbitrary code or cause a denial of service (crash) via crafted packets.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
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-2015-0054 |
| last seen | 2019-05-29 |
| published | 2015-10-21 |
| reporter | Talos Intelligence |
| source | http://www.talosintelligence.com/vulnerability_reports/TALOS-2015-0054 |
| title | Network Time Protocol Trusted Keys Memory Corruption Vulnerability |