Vulnerability identifier: #VU32003

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-8568

CWE-ID: CWE-125

Exploitation vector: Local

Exploit availability: No

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

Vendor: libgit2.github.com

Description

The vulnerability allows a local non-authenticated attacker to perform a denial of service (DoS) attack.

The git_commit_message function in oid.c in libgit2 before 0.24.3 allows remote attackers to cause a denial of service (out-of-bounds read) via a cat-file command with a crafted object file.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libgit2: 0.24.4.0 - 0.24.6.0

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External links
http://lists.opensuse.org/opensuse-updates/2016-12/msg00075.html
http://lists.opensuse.org/opensuse-updates/2017-01/msg00103.html
http://lists.opensuse.org/opensuse-updates/2017-01/msg00110.html
http://lists.opensuse.org/opensuse-updates/2017-01/msg00114.html
http://www.openwall.com/lists/oss-security/2016/10/08/7
http://www.securityfocus.com/bid/93466
http://bugzilla.redhat.com/show_bug.cgi?id=1383211
http://github.com/libgit2/libgit2/issues/3936
http://github.com/libgit2/libgit2/releases/tag/v0.24.3
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4E77DG5KGQ7L34U75QY7O6NIPKZNQHQJ/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X3JBSNJAXP7JA3TGE2NPNRTD77JXFG4E/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XVUEIG6EESZB6BRU2IE3F5NRUEHMAEKC/

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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