1 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
2 |
Gentoo Linux Security Advisory GLSA 200511-06 |
3 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
4 |
http://security.gentoo.org/ |
5 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
6 |
|
7 |
Severity: Normal |
8 |
Title: fetchmail: Password exposure in fetchmailconf |
9 |
Date: November 06, 2005 |
10 |
Bugs: #110366 |
11 |
ID: 200511-06 |
12 |
|
13 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
14 |
|
15 |
Synopsis |
16 |
======== |
17 |
|
18 |
fetchmailconf fails to properly handle file permissions, temporarily |
19 |
exposing sensitive information to other local users. |
20 |
|
21 |
Background |
22 |
========== |
23 |
|
24 |
fetchmail is a utility that retrieves and forwards mail from remote |
25 |
systems using IMAP, POP, and other protocols. It ships with |
26 |
fetchmailconf, a graphical utility used to create configuration files. |
27 |
|
28 |
Affected packages |
29 |
================= |
30 |
|
31 |
------------------------------------------------------------------- |
32 |
Package / Vulnerable / Unaffected |
33 |
------------------------------------------------------------------- |
34 |
1 net-mail/fetchmail < 6.2.5.2-r1 >= 6.2.5.2-r1 |
35 |
|
36 |
Description |
37 |
=========== |
38 |
|
39 |
Thomas Wolff discovered that fetchmailconf opens the configuration file |
40 |
with default permissions, writes the configuration to it, and only then |
41 |
restricts read permissions to the owner. |
42 |
|
43 |
Impact |
44 |
====== |
45 |
|
46 |
A local attacker could exploit the race condition to retrieve sensitive |
47 |
information like IMAP/POP passwords. |
48 |
|
49 |
Workaround |
50 |
========== |
51 |
|
52 |
Run "umask 077" to temporarily strengthen default permissions, then run |
53 |
"fetchmailconf" from the same shell. |
54 |
|
55 |
Resolution |
56 |
========== |
57 |
|
58 |
All fetchmail users should upgrade to the latest version: |
59 |
|
60 |
# emerge --sync |
61 |
# emerge --ask --oneshot --verbose ">=net-mail/fetchmail-6.2.5.2-r1" |
62 |
|
63 |
References |
64 |
========== |
65 |
|
66 |
[ 1 ] Fetchmail Security Advisory |
67 |
http://fetchmail.berlios.de/fetchmail-SA-2005-02.txt |
68 |
[ 2 ] CVE-2005-3088 |
69 |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3088 |
70 |
|
71 |
Availability |
72 |
============ |
73 |
|
74 |
This GLSA and any updates to it are available for viewing at |
75 |
the Gentoo Security Website: |
76 |
|
77 |
http://security.gentoo.org/glsa/glsa-200511-06.xml |
78 |
|
79 |
Concerns? |
80 |
========= |
81 |
|
82 |
Security is a primary focus of Gentoo Linux and ensuring the |
83 |
confidentiality and security of our users machines is of utmost |
84 |
importance to us. Any security concerns should be addressed to |
85 |
security@g.o or alternatively, you may file a bug at |
86 |
http://bugs.gentoo.org. |
87 |
|
88 |
License |
89 |
======= |
90 |
|
91 |
Copyright 2005 Gentoo Foundation, Inc; referenced text |
92 |
belongs to its owner(s). |
93 |
|
94 |
The contents of this document are licensed under the |
95 |
Creative Commons - Attribution / Share Alike license. |
96 |
|
97 |
http://creativecommons.org/licenses/by-sa/2.0 |