Gentoo Archives: gentoo-announce

From: Thomas Deutschmann <whissi@g.o>
To: gentoo-announce@l.g.o
Subject: [gentoo-announce] [ GLSA 202003-62 ] GNU Screen: Buffer overflow
Date: Mon, 30 Mar 2020 14:45:34
Message-Id: 97880b74-93de-7ca4-f796-bcf9c904d99b@gentoo.org
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2 Gentoo Linux Security Advisory GLSA 202003-62
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4 https://security.gentoo.org/
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6
7 Severity: Normal
8 Title: GNU Screen: Buffer overflow
9 Date: March 30, 2020
10 Bugs: #708460
11 ID: 202003-62
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14
15 Synopsis
16 ========
17
18 A buffer overflow in GNU Screen might allow remote attackers to corrupt
19 memory.
20
21 Background
22 ==========
23
24 GNU Screen is a full-screen window manager that multiplexes a physical
25 terminal between several processes, typically interactive shells.
26
27 Affected packages
28 =================
29
30 -------------------------------------------------------------------
31 Package / Vulnerable / Unaffected
32 -------------------------------------------------------------------
33 1 app-misc/screen < 4.8.0 >= 4.8.0
34
35 Description
36 ===========
37
38 A buffer overflow was found in the way GNU Screen treated the special
39 escape OSC 49.
40
41 Impact
42 ======
43
44 A remote attacker, by writing a specially crafted string of characters
45 to a GNU Screen window, could possibly corrupt memory or have other
46 unspecified impact.
47
48 Workaround
49 ==========
50
51 There is no known workaround at this time.
52
53 Resolution
54 ==========
55
56 All GNU Screen users should upgrade to the latest version:
57
58 # emerge --sync
59 # emerge --ask --oneshot --verbose ">=app-misc/screen-4.8.0"
60
61 References
62 ==========
63
64 [ 1 ] CVE-2020-9366
65 https://nvd.nist.gov/vuln/detail/CVE-2020-9366
66
67 Availability
68 ============
69
70 This GLSA and any updates to it are available for viewing at
71 the Gentoo Security Website:
72
73 https://security.gentoo.org/glsa/202003-62
74
75 Concerns?
76 =========
77
78 Security is a primary focus of Gentoo Linux and ensuring the
79 confidentiality and security of our users' machines is of utmost
80 importance to us. Any security concerns should be addressed to
81 security@g.o or alternatively, you may file a bug at
82 https://bugs.gentoo.org.
83
84 License
85 =======
86
87 Copyright 2020 Gentoo Foundation, Inc; referenced text
88 belongs to its owner(s).
89
90 The contents of this document are licensed under the
91 Creative Commons - Attribution / Share Alike license.
92
93 https://creativecommons.org/licenses/by-sa/2.5

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