Gentoo Archives: gentoo-announce

From: Raphael Marichez <falco@g.o>
To: gentoo-announce@g.o
Cc: bugtraq@×××××××××××××.com, full-disclosure@××××××××××××××.uk, security-alerts@×××××××××××××.com
Subject: [gentoo-announce] [ GLSA 200710-18 ] util-linux: Local privilege escalation
Date: Thu, 18 Oct 2007 20:52:54
Message-Id: 20071018200637.GC16878@falco.falcal.net
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2 Gentoo Linux Security Advisory GLSA 200710-18
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4 http://security.gentoo.org/
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6
7 Severity: High
8 Title: util-linux: Local privilege escalation
9 Date: October 18, 2007
10 Bugs: #195390
11 ID: 200710-18
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15 Synopsis
16 ========
17
18 The mount and umount programs might allow local attackers to gain root
19 privileges.
20
21 Background
22 ==========
23
24 util-linux is a suite of Linux programs including mount and umount,
25 programs used to mount and unmount filesystems.
26
27 Affected packages
28 =================
29
30 -------------------------------------------------------------------
31 Package / Vulnerable / Unaffected
32 -------------------------------------------------------------------
33 1 sys-apps/util-linux < 2.12r-r8 >= 2.12r-r8
34
35 Description
36 ===========
37
38 Ludwig Nussel discovered that the check_special_mountprog() and
39 check_special_umountprog() functions call setuid() and setgid() in the
40 wrong order and do not check the return values, which can lead to
41 privileges being dropped improperly.
42
43 Impact
44 ======
45
46 A local attacker may be able to exploit this vulnerability by using
47 mount helpers such as the mount.nfs program to gain root privileges and
48 run arbitrary commands.
49
50 Workaround
51 ==========
52
53 There is no known workaround at this time.
54
55 Resolution
56 ==========
57
58 All util-linux users should upgrade to the latest version:
59
60 # emerge --sync
61 # emerge --ask --oneshot --verbose ">=sys-apps/util-linux-2.12r-r8"
62
63 References
64 ==========
65
66 [ 1 ] CVE-2007-5191
67 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5191
68
69 Availability
70 ============
71
72 This GLSA and any updates to it are available for viewing at
73 the Gentoo Security Website:
74
75 http://security.gentoo.org/glsa/glsa-200710-18.xml
76
77 Concerns?
78 =========
79
80 Security is a primary focus of Gentoo Linux and ensuring the
81 confidentiality and security of our users machines is of utmost
82 importance to us. Any security concerns should be addressed to
83 security@g.o or alternatively, you may file a bug at
84 http://bugs.gentoo.org.
85
86 License
87 =======
88
89 Copyright 2007 Gentoo Foundation, Inc; referenced text
90 belongs to its owner(s).
91
92 The contents of this document are licensed under the
93 Creative Commons - Attribution / Share Alike license.
94
95 http://creativecommons.org/licenses/by-sa/2.5