drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Ausführen beliebiger Kommandos in GNU Screen
Name: |
Ausführen beliebiger Kommandos in GNU Screen |
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ID: |
202105-11 |
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Distribution: |
Gentoo |
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Plattformen: |
Keine Angabe |
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Datum: |
Mi, 26. Mai 2021, 23:00 |
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Referenzen: |
https://nvd.nist.gov/vuln/detail/CVE-2021-26937 |
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Applikationen: |
screen |
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Originalnachricht |
This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --XFx2AhBtpQv3xH9BCyceHaBkti58J7zcx Content-Type: multipart/mixed; boundary="VWWPDAy7elut4yeSSVHc6GzDsy5P8WhbC"; protected-headers="v1" From: Thomas Deutschmann <whissi@gentoo.org> Reply-To: security@gentoo.org To: gentoo-announce@lists.gentoo.org Message-ID: <79b2bae7-0ced-cb49-22ae-dfd2e9b53ad5@gentoo.org> Subject: [ GLSA 202105-11 ] GNU Screen: User-assisted execution of arbitrary code
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 202105-11 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal Title: GNU Screen: User-assisted execution of arbitrary code Date: May 26, 2021 Bugs: #769770 ID: 202105-11
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Synopsis ========
A vulnerability in GNU screen may allow a remote attacker to execute arbitrary code.
Background ==========
GNU Screen is a full-screen window manager that multiplexes a physical terminal between several processes, typically interactive shells.
Affected packages =================
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-misc/screen < 4.8.0-r2 >= 4.8.0-r2
Description ===========
It was discovered that GNU screen did not properly handle certain UTF-8 character sequences.
Impact ======
A remote attacker could entice a user to run a program where attacker controls the output inside a GNU screen session, possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition.
Workaround ==========
This vulnerability can be mitigated by disabling UTF-8 processing in .screenrc.
Resolution ==========
All GNU screen users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-misc/screen-4.8.0-r2"
References ==========
[ 1 ] CVE-2021-26937 https://nvd.nist.gov/vuln/detail/CVE-2021-26937
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
https://security.gentoo.org/glsa/202105-11
Concerns? =========
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
License =======
Copyright 2021 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
https://creativecommons.org/licenses/by-sa/2.5
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