#VU32001 NULL pointer dereference in libgit2 - CVE-2016-10129

Vulnerability identifier: #VU32001

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-10129

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libgit2
Universal components / Libraries / Libraries used by multiple products

Vendor: libgit2.github.com

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error. A remote attacker can trigger denial of service conditions via an empty packet line.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libgit2: 0.24.4.0 - 0.25.1.0

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External links
https://lists.opensuse.org/opensuse-updates/2017-02/msg00030.html
https://lists.opensuse.org/opensuse-updates/2017-02/msg00036.html
https://lists.opensuse.org/opensuse-updates/2017-02/msg00072.html
https://www.openwall.com/lists/oss-security/2017/01/10/5
https://www.openwall.com/lists/oss-security/2017/01/11/6
https://www.securityfocus.com/bid/95339
https://github.com/libgit2/libgit2/commit/2fdef641fd0dd2828bd948234ae86de75221a11a
https://github.com/libgit2/libgit2/commit/84d30d569ada986f3eef527cbdb932643c2dd037
https://libgit2.github.com/security/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.