GIMP HDR File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GIMP. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of HDR files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-27803.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4341 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4341-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                      Sylvain Beucler     October 22, 2025                              https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : gegl     Version        : 1:0.4.26-2+deb11u1     CVE ID         : CVE-2021-45463 CVE-2025-10921     Debian Bug     : 1002661 1116470

    Multiple vulnerabilities were discovered in GEGL, a graph-based image     processing library, which could result in denial of service or the     execution of arbitrary code if malformed files or filenames are     processed.

    CVE-2021-45463

        load_cache allows shell expansion when a pathname in a constructed         command line is not escaped or filtered. This is caused by use of         the system library function for execution of the ImageMagick         convert fallback in magick-load.

    CVE-2025-10921

        GIMP HDR File Parsing Heap-based Buffer Overflow Remote Code         Execution Vulnerability.

    For Debian 11 bullseye, these problems have been fixed in version     1:0.4.26-2+deb11u1.

    We recommend that you upgrade your gegl packages.

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

    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 these issues but has instead relied only on the application's self-reported version number.

The version of gegl installed on the remote host is prior to 0.2.0-19. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2025-3030 advisory.

    GIMP HDR File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability (CVE-2025-10921)

Tenable has extracted the preceding description block directly from the tested product 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 12 / 13 host has packages installed that are affected by a vulnerability as referenced in the dsa-6018 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6018-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     October 03, 2025                      https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : gegl     CVE ID         : CVE-2025-10921

    A buffer overflow was discovered in the RGBE/HDR parser of GEGL, a     graph-based image processing library, which could result in denial of     service or the execution of arbitrary code if malformed files are     processed.

    For the oldstable distribution (bookworm), this problem has been fixed     in version 1:0.4.42-2+deb12u1.

    For the stable distribution (trixie), this problem has been fixed in     version 1:0.4.62-2+deb13u1.

    We recommend that you upgrade your gegl packages.

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

    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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - The vulnerability exists due to a boundary error within the rgbe_read_new_rle() function in     libs/rgbe/rgbe.c when handling HDR files. A remote attacker can trick the victim into opening a specially     crafted file, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
    (CVE-2025-10921)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
271203	Debian dla-4341 : gegl - security update	Nessus	Debian Local Security Checks	high
270527	Amazon Linux 2 : gegl, --advisory ALAS2-2025-3030 (ALAS-2025-3030)	Nessus	Amazon Linux Local Security Checks	high
266464	Debian dsa-6018 : gegl - security update	Nessus	Debian Local Security Checks	high
266111	Linux Distros Unpatched Vulnerability : CVE-2025-10921	Nessus	Misc.	high

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CVE-2025-10921

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