Gentoo Archives: gentoo-announce

From: Thomas Deutschmann <whissi@g.o>
To: gentoo-announce@l.g.o
Subject: [gentoo-announce] [ GLSA 202012-11 ] c-ares: Denial of service
Date: Wed, 23 Dec 2020 20:19:08
Message-Id: 89e25632-4409-8b13-7fce-cff0b70ceb05@gentoo.org
1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
2 Gentoo Linux Security Advisory GLSA 202012-11
3 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
4 https://security.gentoo.org/
5 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
6
7 Severity: Low
8 Title: c-ares: Denial of service
9 Date: December 23, 2020
10 Bugs: #754939
11 ID: 202012-11
12
13 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
14
15 Synopsis
16 ========
17
18 A Denial of Service vulnerability was discovered in c-ares.
19
20 Background
21 ==========
22
23 c-ares is an asynchronous resolver library.
24
25 Affected packages
26 =================
27
28 -------------------------------------------------------------------
29 Package / Vulnerable / Unaffected
30 -------------------------------------------------------------------
31 1 net-dns/c-ares < 1.17.1 >= 1.17.1
32
33 Description
34 ===========
35
36 It was discovered that c-ares incorrectly handled certain DNS requests.
37
38 Impact
39 ======
40
41 A remote attacker, able to trigger a DNS request for a host of their
42 choice by an application linked against c-ares, could possibly cause a
43 Denial of Service condition.
44
45 Workaround
46 ==========
47
48 There is no known workaround at this time.
49
50 Resolution
51 ==========
52
53 All c-ares users should upgrade to the latest version:
54
55 # emerge --sync
56 # emerge --ask --oneshot --verbose ">=net-dns/c-ares-1.17.1"
57
58 References
59 ==========
60
61 [ 1 ] CVE-2020-8277
62 https://nvd.nist.gov/vuln/detail/CVE-2020-8277
63
64 Availability
65 ============
66
67 This GLSA and any updates to it are available for viewing at
68 the Gentoo Security Website:
69
70 https://security.gentoo.org/glsa/202012-11
71
72 Concerns?
73 =========
74
75 Security is a primary focus of Gentoo Linux and ensuring the
76 confidentiality and security of our users' machines is of utmost
77 importance to us. Any security concerns should be addressed to
78 security@g.o or alternatively, you may file a bug at
79 https://bugs.gentoo.org.
80
81 License
82 =======
83
84 Copyright 2020 Gentoo Foundation, Inc; referenced text
85 belongs to its owner(s).
86
87 The contents of this document are licensed under the
88 Creative Commons - Attribution / Share Alike license.
89
90 https://creativecommons.org/licenses/by-sa/2.5

Attachments

File name MIME type
OpenPGP_signature.asc application/pgp-signature