CVE-2017-16611 - Improper Link Resolution Before File Access ('Link Following')

Severity

21%

Complexity

39%

Confidentiality

48%

In libXfont before 1.5.4 and libXfont2 before 2.0.3, a local attacker can open (but not read) files on the system as root, triggering tape rewinds, watchdogs, or similar mechanisms that can be triggered by opening files.

In libXfont before 1.5.4 and libXfont2 before 2.0.3, a local attacker can open (but not read) files on the system as root, triggering tape rewinds, watchdogs, or similar mechanisms that can be triggered by opening files.

CVSS 3.0 Base Score 5.5. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 2.1. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:N/I:N/A:P).

Overview

First reported 7 years ago

2017-12-01 17:29:00

Last updated 5 years ago

2019-10-03 00:03:00

Affected Software

Debian Linux 8.0 (Jessie)

8.0

Debian Linux 9.0

9.0

Canonical Ubuntu Linux 14.04 LTS (Long-Term Support)

14.04

Canonical Ubuntu Linux 16.04 LTS (Long-Term Support)

16.04

Canonical Ubuntu Linux 17.04

17.04

Canonical Ubuntu Linux 17.10

17.10

References

http://security.cucumberlinux.com/security/details.php?id=155

Third Party Advisory

[oss-security] 20171128 CVE-2017-16611 libXfont Open files with O_NOFOLLOW

Mailing List, Patch, Third Party Advisory

USN-3500-1

Third Party Advisory

https://bugzilla.suse.com/show_bug.cgi?id=1050459

Issue Tracking, Tool Signature, VDB Entry

[freedesktop-xorg-announce] 20171128 libXfont2 2.0.3

Patch, Third Party Advisory

[freedesktop-xorg-announce] 20171128 libXfont 1.5.4

Patch, Third Party Advisory

GLSA-201801-10

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