1 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
2 |
Gentoo Linux Security Advisory GLSA 200403-06 |
3 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
4 |
http://security.gentoo.org |
5 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
6 |
|
7 |
Severity: Normal |
8 |
Title: Multiple remote buffer overflow vulnerabilities in Courier |
9 |
Date: March 26, 2004 |
10 |
Bugs: #45584 |
11 |
ID: 200403-06 |
12 |
|
13 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
14 |
|
15 |
Synopsis |
16 |
======== |
17 |
|
18 |
Remote buffer overflow vulnerabilites have been found in Courier-IMAP |
19 |
and Courier MTA. These exploits may allow the execution of abritrary |
20 |
code, allowing unauthorized access to a vulnerable system. |
21 |
|
22 |
Background |
23 |
========== |
24 |
|
25 |
Courier MTA is a multiprotocol mail server suite that provides webmail, |
26 |
mailing lists, IMAP, and POP3 services. Courier-IMAP is a standalone |
27 |
server that gives IMAP access to local mailboxes. |
28 |
|
29 |
Affected packages |
30 |
================= |
31 |
|
32 |
------------------------------------------------------------------- |
33 |
Package / Vulnerable / Unaffected |
34 |
------------------------------------------------------------------- |
35 |
net-mail/courier-imap < 3.0.0 >= 3.0.0 |
36 |
net-mail/courier < 0.45 >= 0.45 |
37 |
|
38 |
Description |
39 |
=========== |
40 |
|
41 |
The vulnerabilities have been found in the 'SHIFT_JIS' converter in |
42 |
'shiftjis.c' and 'ISO2022JP' converter in 'so2022jp.c'. An attacker may |
43 |
supply Unicode characters that exceed BMP (Basic Multilingual Plane) |
44 |
range, causing an overflow. |
45 |
|
46 |
Impact |
47 |
====== |
48 |
|
49 |
An attacker without privileges may exploit this vulnerability remotely, |
50 |
allowing arbitrary code to be executed in order to gain unauthorized |
51 |
access. |
52 |
|
53 |
Workaround |
54 |
========== |
55 |
|
56 |
While a workaround is not currently known for this issue, all users are |
57 |
advised to upgrade to the latest version of the affected packages. |
58 |
|
59 |
Resolution |
60 |
========== |
61 |
|
62 |
All users should upgrade to the current version of the affected |
63 |
packages: |
64 |
|
65 |
# emerge sync |
66 |
|
67 |
# emerge -pv ">=net-mail/courier-imap-3.0.0" |
68 |
# emerge ">=net-mail/courier-imap-3.0.0" |
69 |
|
70 |
# ** Or; depending on your installation... ** |
71 |
|
72 |
# emerge -pv ">=net-mail/courier-0.45" |
73 |
# emerge ">=net-mail/courier-0.45" |
74 |
|
75 |
References |
76 |
========== |
77 |
|
78 |
[ 1 ] http://www.securityfocus.com/bid/9845 |
79 |
[ 2 ] http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0224 |
80 |
|
81 |
Concerns? |
82 |
========= |
83 |
|
84 |
Security is a primary focus of Gentoo Linux and ensuring the |
85 |
confidentiality and security of our users machines is of utmost |
86 |
importance to us. Any security concerns should be addressed to |
87 |
security@g.o or alternatively, you may file a bug at |
88 |
http://bugs.gentoo.org. |