1 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
2 |
Gentoo Linux Security Advisory GLSA 201706-22 |
3 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
4 |
https://security.gentoo.org/ |
5 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
6 |
|
7 |
Severity: Normal |
8 |
Title: libksba: Denial of Service and information disclosure |
9 |
Date: June 22, 2017 |
10 |
Bugs: #592078 |
11 |
ID: 201706-22 |
12 |
|
13 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
14 |
|
15 |
Synopsis |
16 |
======== |
17 |
|
18 |
Multiple vulnerabilities have been found in libksba which might allow |
19 |
remote attackers to obtain sensitive information or crash an |
20 |
libksba-based application. |
21 |
|
22 |
Background |
23 |
========== |
24 |
|
25 |
Libksba is a X.509 and CMS (PKCS#7) library. |
26 |
|
27 |
Affected packages |
28 |
================= |
29 |
|
30 |
------------------------------------------------------------------- |
31 |
Package / Vulnerable / Unaffected |
32 |
------------------------------------------------------------------- |
33 |
1 dev-libs/libksba < 1.3.5 >= 1.3.5 |
34 |
|
35 |
Description |
36 |
=========== |
37 |
|
38 |
It was found that an unproportionate amount of memory is allocated when |
39 |
parsing crafted certificates in libskba, which may lead to Denial of |
40 |
Service condition. |
41 |
|
42 |
Moreover in libksba 1.3.4, allocated memory is uninitialized and could |
43 |
potentially contain sensitive data left in freed memory block. |
44 |
|
45 |
Impact |
46 |
====== |
47 |
|
48 |
A remote attacker, able to interact with an libksba-based application, |
49 |
could possibly obtain sensitive information or cause a Denial of |
50 |
Service condition. |
51 |
|
52 |
Workaround |
53 |
========== |
54 |
|
55 |
There is no known workaround at this time. |
56 |
|
57 |
Resolution |
58 |
========== |
59 |
|
60 |
All libksba users should upgrade to the latest version: |
61 |
|
62 |
# emerge --sync |
63 |
# emerge --ask --oneshot --verbose ">=dev-libs/libksba-1.3.5" |
64 |
|
65 |
References |
66 |
========== |
67 |
|
68 |
[ 1 ] CVE-2016-4579 |
69 |
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-4579 |
70 |
[ 2 ] Upstream report |
71 |
http://seclists.org/oss-sec/2016/q3/343 |
72 |
|
73 |
Availability |
74 |
============ |
75 |
|
76 |
This GLSA and any updates to it are available for viewing at |
77 |
the Gentoo Security Website: |
78 |
|
79 |
https://security.gentoo.org/glsa/201706-22 |
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 |
https://bugs.gentoo.org. |
89 |
|
90 |
License |
91 |
======= |
92 |
|
93 |
Copyright 2017 Gentoo Foundation, Inc; referenced text |
94 |
belongs to its owner(s). |
95 |
|
96 |
The contents of this document are licensed under the |
97 |
Creative Commons - Attribution / Share Alike license. |
98 |
|
99 |
http://creativecommons.org/licenses/by-sa/2.5 |