Improper access control in libxi - CVE-2016-7946

Vulnerability identifier: #VU32230

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-2016-7946

CWE-ID: CWE-284

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

X.org libXi before 1.7.7 allows remote X servers to cause a denial of service (infinite loop) via vectors involving length fields.

libxi
libxi (Alpine package)
libXi
libxi6 (Ubuntu package)
Gentoo Linux
Slackware Linux
Ubuntu
Fedora

Install update from vendor's website.

libxi - update to 1.7.7
libxi (Alpine package) - update to 1.7.4-r1
libXi - addressed in versions 1.7.7-1.fc23, 1.7.7-1.fc24, 1.7.7-1.fc25, 1.7.7-2.fc23, 1.7.8-2.fc23
libxi6 (Ubuntu package) - update to 2:1.7.61ubuntu0.1~esm1

• http://www.openwall.com/lists/oss-security/2016/10/04/2
• http://www.openwall.com/lists/oss-security/2016/10/04/4
• http://www.securityfocus.com/bid/93374
• http://www.securitytracker.com/id/1036945
• https://cgit.freedesktop.org/xorg/lib/libXi/commit/?id=19a9cd607de73947fcfb104682f203ffe4e1f4e5
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/C3NTWIWSQ575GREBVAOUQUIMDL5CDVGP/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KVTZ2XLPKLASQUIQA2GMKKAUOQIUMM7I/
• https://lists.x.org/archives/xorg-announce/2016-October/002720.html
• https://security.gentoo.org/glsa/201704-03

• Improper access control in xorg.freedesktop libxi
• Improper access control in libxi (Alpine package)
• Gentoo update for X.Org
• Slackware Linux update for x11
• Ubuntu update for libxi
• Fedora 25 update for libXi
• Fedora 24 update for libXi
• Fedora 23 update for libXi
• Fedora 23 update for libXi
• Fedora 23 update for libXi