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GLSA
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Joined: 12 May 2004
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PostPosted: Sun Jun 26, 2016 3:26 pm    Post subject: [ GLSA 201606-13 ] sudo Reply with quote

Gentoo Linux Security Advisory

Title: sudo: Unauthorized privilege escalation in sudoedit (GLSA 201606-13)
Severity: normal
Exploitable: local
Date: June 26, 2016
Bug(s): #564774
ID: 201606-13

Synopsis

sudo is vulnerable to an escalation of privileges via a symlink
attack.


Background

sudo (su “do”) allows a system administrator to delegate authority
to give certain users (or groups of users) the ability to run some (or
all) commands as root or another user while providing an audit trail of
the commands and their arguments.


Affected Packages

Package: app-admin/sudo
Vulnerable: < 1.8.15-r1
Unaffected: >= 1.8.15-r1
Architectures: All supported architectures


Description

sudoedit in sudo is vulnerable to the escalation of privileges by local
users via a symlink attack. This can be exploited by a file whose full
path is defined using multiple wildcards in /etc/sudoers, as demonstrated
by “/home//file.txt.


Impact

Local users are able to gain unauthorized privileges on the system.

Workaround

There is no known work around at this time.

Resolution

All sudo users should upgrade to the latest version:
Code:
# emerge --sync
      # emerge --ask --oneshot --verbose ">=app-admin/sudo-1.8.15-r1"
   


References


CVE-2015-5602
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