Gentoo Archives: gentoo-announce

From: Thomas Deutschmann <whissi@g.o>
To: gentoo-announce@l.g.o
Subject: [gentoo-announce] [ GLSA 201808-03 ] NetworkManager VPNC plugin: Privilege escalation
Date: Wed, 22 Aug 2018 21:38:49
Message-Id: e291e423-4496-912c-f527-5d3764670ae2@gentoo.org
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2 Gentoo Linux Security Advisory GLSA 201808-03
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4 https://security.gentoo.org/
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6
7 Severity: Normal
8 Title: NetworkManager VPNC plugin: Privilege escalation
9 Date: August 22, 2018
10 Bugs: #661712
11 ID: 201808-03
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14
15 Synopsis
16 ========
17
18 A vulnerability in NetworkManager VPNC plugin allows local users to
19 escalate privileges.
20
21 Background
22 ==========
23
24 NetworkManager is an universal network configuration daemon for
25 laptops, desktops, servers and virtualization hosts.
26
27 The VPNC plugin provides easy access Cisco Concentrator based VPN's
28 utilizing NetworkManager.
29
30 Affected packages
31 =================
32
33 -------------------------------------------------------------------
34 Package / Vulnerable / Unaffected
35 -------------------------------------------------------------------
36 1 net-misc/networkmanager-vpnc
37 < 1.2.6 >= 1.2.6
38
39 Description
40 ===========
41
42 When initiating a VPNC connection, NetworkManager spawns a new vpnc
43 process and passes the configuration via STDIN. By injecting a special
44 character into a configuration parameter, an attacker can coerce
45 NetworkManager to set the Password helper option to an attacker
46 controlled executable file.
47
48 Impact
49 ======
50
51 A local attacker is able to escalate privileges via a specially crafted
52 configuration file.
53
54 Workaround
55 ==========
56
57 There is no known workaround at this time.
58
59 Resolution
60 ==========
61
62 All NetworkManager VPNC plugin users should upgrade to the latest
63 version:
64
65 # emerge --sync
66 # emerge --ask --oneshot -v ">=net-misc/networkmanager-vpnc-1.2.6"
67
68 References
69 ==========
70
71 [ 1 ] CVE-2018-10900
72 https://nvd.nist.gov/vuln/detail/CVE-2018-10900
73
74 Availability
75 ============
76
77 This GLSA and any updates to it are available for viewing at
78 the Gentoo Security Website:
79
80 https://security.gentoo.org/glsa/201808-03
81
82 Concerns?
83 =========
84
85 Security is a primary focus of Gentoo Linux and ensuring the
86 confidentiality and security of our users' machines is of utmost
87 importance to us. Any security concerns should be addressed to
88 security@g.o or alternatively, you may file a bug at
89 https://bugs.gentoo.org.
90
91 License
92 =======
93
94 Copyright 2018 Gentoo Foundation, Inc; referenced text
95 belongs to its owner(s).
96
97 The contents of this document are licensed under the
98 Creative Commons - Attribution / Share Alike license.
99
100 https://creativecommons.org/licenses/by-sa/2.5

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