Summary
Ein lokaler Angreifer kann mehrere Schwachstellen in screen ausnutzen, um seine Privilegien zu erhöhen, Daten zu manipulieren oder Informationen offenzulegen.
Product
Screen ist ein Terminalmultiplexer, der es ermöglicht, mehrere Sitzungen innerhalb eines einzigen Terminalfensters zu nutzen.
Vulnerabilities 5
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High 7.8
Local root exploit via `logfile_reopen()` in screen 5.0.0 with setuid-root bit set
Screen 5.0.0 when it runs with setuid-root privileges does not drop privileges while operating on a user supplied path. This allows unprivileged users to create files in arbitrary locations with `root` ownership, the invoking user's (real) group ownership and…
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Medium 6.0
Temporary chown() of users' TTY to mode 0666 allows PTY hijacking in screen
For a short time they PTY is set to mode 666, allowing any user on the system to connect to the screen session.
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Medium 5.5
Screen has a TOCTOU race potentially allowing to send SIGHUP, SIGCONT to privileged processes when installed setuid-root
Screen version 5.0.0 and older version 4 releases have a TOCTOU race potentially allowing to send SIGHUP, SIGCONT to privileged processes when installed setuid-root.
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Medium 5.0
Screen creates by default world-writable PTYs
The default mode of pseudo terminals (PTYs) allocated by Screen was changed from 0620 to 0622, thereby allowing anyone to write to any Screen PTYs in the system.
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Low 3.3
Screen 5.0.0 and older versions allow file existence tests when installed setuid-root
A minor information leak when running Screen with setuid-root privileges allows unprivileged users to deduce information about a path that would otherwise not be available. Affected are older Screen versions, as well as version 5.0.0.
Revision history
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#15
Neue Updates von Gentoo aufgenommen
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#14
Neue Updates von SUSE aufgenommen
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#13
Neue Updates von SUSE aufgenommen
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#12
Neue Updates von Ubuntu aufgenommen
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#11
Neue Updates von Dell aufgenommen
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#10
Neue Updates von SUSE aufgenommen
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#9
Neue Updates von Amazon aufgenommen
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#8
Neue Updates von Fedora aufgenommen
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#7
Neue Updates von SUSE aufgenommen
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#6
Neue Updates von Fedora aufgenommen
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#5
Neue Updates von SUSE aufgenommen
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#4
Neue Updates von SUSE aufgenommen
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#3
Neue Updates von Amazon aufgenommen
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#2
Neue Updates von openSUSE aufgenommen
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#1
Initiale Fassung
References
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GNU screen Git commit version 5.0.1 vom 2025-05-13
https://git.savannah.gnu.org/cgit/screen.git/commit/?h=screen-v5
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GNU screen Git commit CVE-2025-23395 vom 2025-05-13
https://git.savannah.gnu.org/cgit/screen.git/commit/?id=e894caeffccdb62f9c644989a936dc7ec83cc747
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GNU screen Git commit CVE-2025-46802 vom 2025-05-13
https://git.savannah.gnu.org/cgit/screen.git/commit/?h=screen-v4&id=049b26b22e197ba3be9c46e5c193032e01a4724a
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GNU screen Git commit CVE-2025-46803 vom 2025-05-13
https://git.savannah.gnu.org/cgit/screen.git/commit/?id=d5d7bf43f3842e8b62d5f34eb4b031de7c8098c1
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GNU screen Git commit CVE-2025-46804 vom 2025-05-13
https://git.savannah.gnu.org/cgit/screen.git/commit/?h=screen-v4&id=e0eef5aac453fa98a2664416a56c50ad1d00cb30
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GNU screen Git commit CVE-2025-46805 vom 2025-05-13
https://git.savannah.gnu.org/cgit/screen.git/commit/?h=screen-v4&id=161f85b98b7e1d5e4893aeed20f4cdb5e3dfaaa4
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Arch Linux Security Advisory ASA-202505-1 vom 2025-05-13
https://security.archlinux.org/ASA-202505-1
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openSUSE Security Update OPENSUSE-SU-2025:15164-1 vom 2025-05-27
https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/message/EHAVZBGPF26QCKDE25CJVWLHNTDLGTXQ/
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Amazon Linux Security Advisory ALAS-2025-2878 vom 2025-06-12
https://alas.aws.amazon.com/AL2/ALAS-2025-2878.html
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SUSE Security Update SUSE-SU-2025:20403-1 vom 2025-06-13
https://lists.suse.com/pipermail/sle-security-updates/2025-June/021519.html
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SUSE Security Update SUSE-SU-2025:02016-1 vom 2025-06-19
https://lists.suse.com/pipermail/sle-security-updates/2025-June/021578.html
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Fedora Security Advisory FEDORA-2025-824E33E598 vom 2025-06-26
https://bodhi.fedoraproject.org/updates/FEDORA-2025-824e33e598
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Fedora Security Advisory FEDORA-EPEL-2025-70302AABFF vom 2025-06-26
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2025-70302aabff
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SUSE Security Update SUSE-SU-2025:20439-1 vom 2025-06-26
https://lists.suse.com/pipermail/sle-security-updates/2025-June/021670.html
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Fedora Security Advisory FEDORA-EPEL-2025-BEEB62AD3C vom 2025-06-30
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2025-beeb62ad3c
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Fedora Security Advisory FEDORA-2025-F055A0D751 vom 2025-06-30
https://bodhi.fedoraproject.org/updates/FEDORA-2025-f055a0d751
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Fedora Security Advisory FEDORA-2025-653690F2F7 vom 2025-06-30
https://bodhi.fedoraproject.org/updates/FEDORA-2025-653690f2f7
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Amazon Linux Security Advisory ALAS2-2025-2878 vom 2025-06-30
https://alas.aws.amazon.com/AL2/ALAS2-2025-2878.html
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SUSE Security Update SUSE-SU-2025:02186-1 vom 2025-07-01
https://lists.suse.com/pipermail/sle-security-updates/2025-July/021732.html
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Dell Security Advisory DSA-2025-381 vom 2025-11-10
https://www.dell.com/support/kbdoc/de-de/000390206/dsa-2025-381-security-update-for-dell-powerscale-onefs-multiple-vulnerabilities
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Ubuntu Security Notice USN-7978-1 vom 2026-01-27
https://ubuntu.com/security/notices/USN-7978-1
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SUSE Security Update SUSE-SU-2026:20304-1 vom 2026-02-13
https://lists.suse.com/pipermail/sle-security-updates/2026-February/024187.html
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SUSE Security Update SUSE-SU-2026:20406-1 vom 2026-02-17
https://lists.suse.com/pipermail/sle-security-updates/2026-February/024290.html
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Gentoo Linux Security Advisory GLSA-202608-27 vom 2026-08-26
https://security.gentoo.org/glsa/202608-27