| 1 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 2 |
Gentoo Linux Security Advisory GLSA 200406-07 |
| 3 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 4 |
http://security.gentoo.org/ |
| 5 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 6 |
|
| 7 |
Severity: High |
| 8 |
Title: Subversion: Remote heap overflow |
| 9 |
Date: June 10, 2004 |
| 10 |
ID: 200406-07 |
| 11 |
|
| 12 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 13 |
|
| 14 |
Synopsis |
| 15 |
======== |
| 16 |
|
| 17 |
Subversion is vulnerable to a remote Denial of Service that may be |
| 18 |
exploitable to execute arbitrary code on the server running svnserve. |
| 19 |
|
| 20 |
Background |
| 21 |
========== |
| 22 |
|
| 23 |
Subversion is a revision control system that aims to be a "compelling |
| 24 |
replacement for CVS". It enjoys wide use in the open source community. |
| 25 |
svnserve allows access to Subversion repositories using URIs with the |
| 26 |
svn://, svn+ssh://, and other tunelled svn+*:// protocols. |
| 27 |
|
| 28 |
Affected packages |
| 29 |
================= |
| 30 |
|
| 31 |
------------------------------------------------------------------- |
| 32 |
Package / Vulnerable / Unaffected |
| 33 |
------------------------------------------------------------------- |
| 34 |
1 dev-util/subversion <= 1.0.4 >= 1.0.4-r1 |
| 35 |
|
| 36 |
Description |
| 37 |
=========== |
| 38 |
|
| 39 |
The svn protocol parser trusts the indicated length of a URI string |
| 40 |
sent by a client. This allows a client to specify a very long string, |
| 41 |
thereby causing svnserve to allocate enough memory to hold that string. |
| 42 |
This may cause a Denial of Service. Alternately, given a string that |
| 43 |
causes an integer overflow in the variable holding the string length, |
| 44 |
the server might allocate less memory than required, allowing a heap |
| 45 |
overflow. This heap overflow may then be exploitable, allowing remote |
| 46 |
code execution. The attacker does not need read or write access to the |
| 47 |
Subversion repository being served, since even un-authenticated users |
| 48 |
can send svn protocol requests. |
| 49 |
|
| 50 |
Impact |
| 51 |
====== |
| 52 |
|
| 53 |
Ranges from remote Denial of Service to potential arbitrary code |
| 54 |
execution with privileges of the svnserve process. |
| 55 |
|
| 56 |
Workaround |
| 57 |
========== |
| 58 |
|
| 59 |
Servers without svnserve running are not vulnerable. Disable svnserve |
| 60 |
and use DAV for access instead. |
| 61 |
|
| 62 |
Resolution |
| 63 |
========== |
| 64 |
|
| 65 |
All users should upgrade to the latest version of Subversion. |
| 66 |
|
| 67 |
# emerge sync |
| 68 |
|
| 69 |
# emerge -pv ">=dev-util/subversion-1.0.4-r1" |
| 70 |
# emerge ">=dev-util/subversion-1.0.4-r1" |
| 71 |
|
| 72 |
References |
| 73 |
========== |
| 74 |
|
| 75 |
[ 1 ] CAN-2004-0413 |
| 76 |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0413 |
| 77 |
|
| 78 |
Availability |
| 79 |
============ |
| 80 |
|
| 81 |
This GLSA and any updates to it are available for viewing at |
| 82 |
the Gentoo Security Website: |
| 83 |
|
| 84 |
http://security.gentoo.org/glsa/glsa-200406-07.xml |
| 85 |
|
| 86 |
Concerns? |
| 87 |
========= |
| 88 |
|
| 89 |
Security is a primary focus of Gentoo Linux and ensuring the |
| 90 |
confidentiality and security of our users machines is of utmost |
| 91 |
importance to us. Any security concerns should be addressed to |
| 92 |
security@g.o or alternatively, you may file a bug at |
| 93 |
http://bugs.gentoo.org. |
| 94 |
|
| 95 |
License |
| 96 |
======= |
| 97 |
|
| 98 |
Copyright 2004 Gentoo Technologies, Inc; referenced text |
| 99 |
belongs to its owner(s). |
| 100 |
|
| 101 |
The contents of this document are licensed under the |
| 102 |
Creative Commons - Attribution / Share Alike license. |
| 103 |
|
| 104 |
http://creativecommons.org/licenses/by-sa/1.0 |
Archives