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[ GLSA 201801-10 ] LibXfont, LibXfont2
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GLSA
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PostPosted: Mon Jan 08, 2018 1:26 pm    Post subject: [ GLSA 201801-10 ] LibXfont, LibXfont2 Reply with quote

Gentoo Linux Security Advisory

Title: LibXfont, LibXfont2: Arbitrary file access (GLSA 201801-10)
Severity: normal
Exploitable: local
Date: 2018-01-08
Bug(s): #639064
ID: 201801-10

Synopsis

A vulnerability has been found in LibXfont and LibXfont2 which may
allow for arbitrary file access.


Background

X.Org Xfont library.

Affected Packages

Package: x11-libs/libXfont
Vulnerable: < 1.5.4
Unaffected: >= 1.5.4
Architectures: All supported architectures

Package: x11-libs/libXfont2
Vulnerable: < 2.0.3
Unaffected: >= 2.0.3
Architectures: All supported architectures


Description

It was discovered that libXfont incorrectly followed symlinks when
opening font files.


Impact

A local unprivileged user could use this flaw to cause the X server to
access arbitrary files, including special device files.


Workaround

There is no known workaround at this time.

Resolution

All LibXfont users should upgrade to the latest version:
Code:
# emerge --sync
      # emerge --ask --oneshot --verbose ">=x11-libs/libXfont-1.5.4"
   
All LibXfont2 users should upgrade to the latest version:
Code:
# emerge --sync
      # emerge --ask --oneshot --verbose ">=x11-libs/libXfont2-2.0.3"
   


References


CVE-2017-16611


Last edited by GLSA on Mon Jan 15, 2018 4:17 am; edited 1 time in total
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