KDE Konsole before 25.04.2 allows remote code execution in a certain scenario. It supports loading URLs from the scheme handlers such as a ssh:// or telnet:// or rlogin:// URL. This can be executed regardless of whether the ssh, telnet, or rlogin binary is available. In this mode, there is a code path where if that binary is not available, Konsole falls back to using /bin/bash for the given arguments (i.e., the URL) provided. This allows an attacker to execute arbitrary code.

The remote Debian 12 host has packages installed that are affected by a vulnerability as referenced in the dsa-5945 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-5945-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     June 20, 2025                         https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : konsole     CVE ID         : CVE-2025-49091

    Dennis Dast discovered that the Konsole terminal emulator insecurely     handled the telnet URI scheme, which could result in the execution     of arbitrary code in some configurations.

    For the stable distribution (bookworm), this problem has been fixed in     version 4:22.12.3-1+deb12u1.

    We recommend that you upgrade your konsole packages.

    For the detailed security status of konsole please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/konsole

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dla-4220 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4220-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                           Chris Lamb     June 17, 2025                                 https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : konsole     Version        : 4:20.12.3-1+deb11u1     CVE ID         : CVE-2025-49091     Debian Bug     : 1107672

    It was discovered that there was a potential remote code execution     vulnerability in konsole, the X terminal emulator of the KDE desktop     environmne.t

    This vulnerability could have been exploited when loading URLs from     scheme handlers such as a ssh:// or telnet://.

    For Debian 11 bullseye, this problem has been fixed in version     4:20.12.3-1+deb11u1.

    We recommend that you upgrade your konsole packages.

    For the detailed security status of konsole please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/konsole

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote host is affected by the vulnerability described in GLSA-202506-13 (Konsole: Code execution)

    Konsole supports loading URLs from the scheme handlers such as telnet://URL. This can be executed     regardless of whether the telnet binary is available. It would fallback to bash in that case and execute     arbitrary code.

Tenable has extracted the preceding description block directly from the Gentoo Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
240218	Debian dsa-5945 : konsole - security update	Nessus	Debian Local Security Checks	high
240150	Debian dla-4220 : konsole - security update	Nessus	Debian Local Security Checks	high
238468	GLSA-202506-13 : Konsole: Code execution	Nessus	Gentoo Local Security Checks	high

Detections

Analytics

CVE-2025-49091

high

Tenable Plugins

high

high

high