NULL pointer dereference in libgit2.github.com libgit2

1) NULL pointer dereference

EUVDB-ID: #VU32004

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-8569

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

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 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

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/93465
http://bugzilla.redhat.com/show_bug.cgi?id=1383211
http://github.com/libgit2/libgit2/issues/3937
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/

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.