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CVE-2021-26937

Status Candidate

Overview

encoding.c in GNU Screen through 4.8.0 allows remote attackers to cause a denial of service (invalid write access and application crash) or possibly have unspecified other impact via a crafted UTF-8 character sequence.

Related Files

Red Hat Security Advisory 2022-1074-01
Posted Mar 28, 2022
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2022-1074-01 - The screen utility allows users to have multiple logins on a single terminal.

tags | advisory
systems | linux, redhat
advisories | CVE-2021-26937
SHA-256 | ff5c7339dddc9fbfa6eec8cc66396d39880cd40f9f9813f4ee92d5e5eda800c2
Gentoo Linux Security Advisory 202105-11
Posted May 26, 2021
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202105-11 - A vulnerability in GNU screen may allow a remote attacker to execute arbitrary code. Versions less than 4.8.0-r2 are affected.

tags | advisory, remote, arbitrary
systems | linux, gentoo
advisories | CVE-2021-26937
SHA-256 | 4bd95475f62d9c82f7524d07f9547b1b765d31db20461a5f8cbd9920bd1fb2ec
Red Hat Security Advisory 2021-0742-01
Posted Mar 8, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0742-01 - The screen utility allows users to have multiple logins on a single terminal.

tags | advisory
systems | linux, redhat
advisories | CVE-2021-26937
SHA-256 | 437f2bfdda5c0fc56efb4eecd8ca284298a0aca836e0ef7326a6f4f5210fe0a8
Debian Security Advisory 4861-1
Posted Feb 28, 2021
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4861-1 - Felix Weinmann reported a flaw in the handling of combining characters in screen, a terminal multiplexer with VT100/ANSI terminal emulation, which can result in denial of service, or potentially the execution of arbitrary code via a specially crafted UTF-8 character sequence.

tags | advisory, denial of service, arbitrary
systems | linux, debian
advisories | CVE-2021-26937
SHA-256 | 569d4df0108d39054a602652829a1fa05af2ce0f91699542d0f207bc9e1d1522
Ubuntu Security Notice USN-4747-2
Posted Feb 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4747-2 - USN-4747-1 fixed a vulnerability in screen. This update provides the corresponding update for Ubuntu 14.04 ESM. Felix Weinmann discovered that GNU Screen incorrectly handled certain character sequences. A remote attacker could use this issue to cause GNU Screen to crash, resulting in a denial of service, or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2021-26937
SHA-256 | 1b3fb06c80115b5fd908c46bc9df0c0b72cf0a01e3ab16f2514b31da9f648478
Ubuntu Security Notice USN-4747-1
Posted Feb 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4747-1 - Felix Weinmann discovered that GNU Screen incorrectly handled certain character sequences. A remote attacker could use this issue to cause GNU Screen to crash, resulting in a denial of service, or possibly execute arbitrary code.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2021-26937
SHA-256 | c7e39b4cc6a8374b5105fdeaf15ac4721ecb333b3d2e2e62995f2f27a11fdb3b
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