NULL pointer dereference in libgit2 - CVE-2016-10129

Vulnerability identifier: #VU32001

CSH Severity: Medium

CVSS v4: 8.7 [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]

CVE-ID: CVE-2016-10129

CWE-ID: CWE-476

Exploitation vector: Remote access

Exploit availability: No public exploit available

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.

libgit2
Arch Linux
Fedora
Ubuntu
libgit2-0.27 (Alpine package)
libgit2-1.0 (Alpine package)
libgit2 (Ubuntu package)
libgit2

Install update from vendor's website.

libgit2-1.0 (Alpine package) - update to 1.0.1-r1
libgit2 (Ubuntu package) - addressed in versions 0.19.0-2ubuntu0.4+esm2, 0.24.1-2ubuntu0.2+esm3, 0.26.0+dfsg.1-1.1ubuntu0.2+esm2, 0.28.4+dfsg.1-2ubuntu0.1+esm1, 1.1.0+dfsg.1-4.1ubuntu0.1+esm1, 1.7.2+ds-1ubuntu3.1, 1.9.1+ds-1ubuntu1.1
libgit2 - addressed in versions 0.24.6-1.el7, 0.24.6-1.fc24, 0.24.6-1.fc25

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

• NULL pointer dereference in libgit2.github.com libgit2
• NULL pointer dereference in libgit2-0.27 (Alpine package)
• Arch Linux update for libgit2
• NULL pointer dereference in libgit2-1.0 (Alpine package)
• Fedora 25 update for libgit2
• Fedora 24 update for libgit2
• Fedora EPEL 7 update for libgit2
• Ubuntu update for libgit2