Vulnerabilities > CVE-2016-10128 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Libgit2 Project Libgit2 0.25.0
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
Buffer overflow in the git_pkt_parse_line function in transports/smart_pkt.c in the Git Smart Protocol support in libgit2 before 0.24.6 and 0.25.x before 0.25.1 allows remote attackers to have unspecified impact via a crafted non-flush packet.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 4 |
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-2017-213.NASL description This update for libgit2 fixes the following issues : - CVE-2016-10130: When using the custom certificate callback or when using pygit2 or git2go a attacker could have caused an invalid certificate to be accepted (bsc#1019037). - CVE-2017-5338: When using the custom certificate callback or when using pygit2 or git2go a attacker could have caused an invalid certificate to be accepted (bsc#1019037). - CVE-2017-5339: When using the custom certificate callback or when using pygit2 or git2go a attacker could have caused an invalid certificate to be accepted (bsc#1019037). - CVE-2016-10128: Additional sanitization prevent some edge cases in the Git Smart Protocol which can lead to reading outside of a buffer (bsc#1019036). - CVE-2016-10129: Additional sanitization prevent some edge cases in the Git Smart Protocol which can lead to reading outside of a buffer (bsc#1019036). last seen 2020-06-05 modified 2017-02-09 plugin id 97074 published 2017-02-09 reporter This script is Copyright (C) 2017-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/97074 title openSUSE Security Update : libgit2 (openSUSE-2017-213) NASL family Fedora Local Security Checks NASL id FEDORA_2017-403346D884.NASL description Update to 0.24.6 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-05 modified 2017-01-16 plugin id 96501 published 2017-01-16 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/96501 title Fedora 24 : libgit2 (2017-403346d884) NASL family SuSE Local Security Checks NASL id OPENSUSE-2017-262.NASL description This update for libgit2 fixes the several issues. These security issues were fixed : - CVE-2016-10128: Additional sanitization prevent some edge cases in the Git Smart Protocol which can lead to reading outside of a buffer (bsc#1019036). - CVE-2016-10129: Additional sanitization prevent some edge cases in the Git Smart Protocol which can lead to reading outside of a buffer (bsc#1019036). - CVE-2016-10130: When using the custom certificate callback or when using pygit2 or git2go a attacker could have caused an invalid certificate to be accepted (bsc#1019037). - CVE-2017-5338: When using the custom certificate callback or when using pygit2 or git2go a attacker could have caused an invalid certificate to be accepted (bsc#1019037). - CVE-2017-5339: When using the custom certificate callback or when using pygit2 or git2go a attacker could have caused an invalid certificate to be accepted (bsc#1019037). This update was imported from the SUSE:SLE-12-SP2:Update update project. last seen 2020-06-05 modified 2017-02-21 plugin id 97282 published 2017-02-21 reporter This script is Copyright (C) 2017-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/97282 title openSUSE Security Update : libgit2 (openSUSE-2017-262) NASL family Fedora Local Security Checks NASL id FEDORA_2017-2DDF7D452A.NASL description Update to 0.24.6 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-05 modified 2017-01-16 plugin id 96500 published 2017-01-16 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/96500 title Fedora 25 : libgit2 (2017-2ddf7d452a)
References
- https://libgit2.github.com/security/
- https://github.com/libgit2/libgit2/commit/66e3774d279672ee51c3b54545a79d20d1ada834
- https://github.com/libgit2/libgit2/commit/4ac39c76c0153d1ee6889a0984c39e97731684b2
- http://www.openwall.com/lists/oss-security/2017/01/11/6
- http://www.openwall.com/lists/oss-security/2017/01/10/5
- http://lists.opensuse.org/opensuse-updates/2017-02/msg00072.html
- http://lists.opensuse.org/opensuse-updates/2017-02/msg00036.html
- http://lists.opensuse.org/opensuse-updates/2017-02/msg00030.html
- http://www.securityfocus.com/bid/95338