Gentoo Archives: gentoo-announce

From: Sam James <sam@g.o>
To: gentoo-announce@l.g.o
Subject: [gentoo-announce] [ GLSA 202008-23 ] chrony: Symlink vulnerability
Date: Sun, 30 Aug 2020 21:18:58
Message-Id: 2B6E7675-CC59-47E3-9AF7-4C29612ACC11@gentoo.org
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2 Gentoo Linux Security Advisory GLSA 202008-23
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4 https://security.gentoo.org/
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6
7 Severity: Normal
8 Title: chrony: Symlink vulnerability
9 Date: August 30, 2020
10 Bugs: #738154
11 ID: 202008-23
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14
15 Synopsis
16 ========
17
18 A vulnerability in chrony may allow a privileged attacker to cause data
19 loss via a symlink.
20
21 Background
22 ==========
23
24 chrony is a versatile implementation of the Network Time Protocol
25 (NTP).
26
27 Affected packages
28 =================
29
30 -------------------------------------------------------------------
31 Package / Vulnerable / Unaffected
32 -------------------------------------------------------------------
33 1 net-misc/chrony < 3.5.1 >= 3.5.1
34
35 Description
36 ===========
37
38 It was found that chrony did not check whether its PID file was a
39 symlink.
40
41 Impact
42 ======
43
44 A local attacker could perform symlink attack(s) to overwrite arbitrary
45 files with root privileges.
46
47 Workaround
48 ==========
49
50 There is no known workaround at this time.
51
52 Resolution
53 ==========
54
55 All chrony users should upgrade to the latest version:
56
57 # emerge --sync
58 # emerge --ask --oneshot --verbose ">=net-misc/chrony-3.5.1"
59
60 References
61 ==========
62
63 [ 1 ] CVE-2020-14367
64 https://nvd.nist.gov/vuln/detail/CVE-2020-14367
65 [ 2 ] chrony-3.5.1 release announcement
66 https://listengine.tuxfamily.org/chrony.tuxfamily.org/chrony-announce/2020/08/msg00000.html
67
68 Availability
69 ============
70
71 This GLSA and any updates to it are available for viewing at
72 the Gentoo Security Website:
73
74 https://security.gentoo.org/glsa/202008-23
75
76 Concerns?
77 =========
78
79 Security is a primary focus of Gentoo Linux and ensuring the
80 confidentiality and security of our users' machines is of utmost
81 importance to us. Any security concerns should be addressed to
82 security@g.o or alternatively, you may file a bug at
83 https://bugs.gentoo.org.
84
85 License
86 =======
87
88 Copyright 2020 Gentoo Foundation, Inc; referenced text
89 belongs to its owner(s).
90
91 The contents of this document are licensed under the
92 Creative Commons - Attribution / Share Alike license.
93
94 https://creativecommons.org/licenses/by-sa/2.5

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