A memory leak (out-of-memory) in gif2rgb in util/gif2rgb.c in giflib 5.1.4 allows remote attackers trigger an out of memory exception or denial of service via a gif format file.

The version of giflib installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2021-40633 advisory.

  - A memory leak (out-of-memory) in gif2rgb in util/gif2rgb.c in giflib 5.1.4 allows remote attackers trigger     an out of memory exception or denial of service via a gif format file. (CVE-2021-40633)

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

The version of giflib installed on the remote host is prior to 4.1.6-9. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2025-2998 advisory.

    A memory leak (out-of-memory) in gif2rgb in util/gif2rgb.c in giflib 5.1.4 allows remote attackers trigger     an out of memory exception or denial of service via a gif format file. (CVE-2021-40633)

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 version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2024:0479 advisory.

    Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:

    CVE-2021-40633:
    A memory leak (out-of-memory) in gif2rgb in util/gif2rgb.c in giflib 5.1.4 allows remote attackers trigger     an out of memory exception or denial of service via a gif format file.

Tenable has extracted the preceding description block directly from the Tencent 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.

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - A memory leak (out-of-memory) in gif2rgb in util/gif2rgb.c in giflib 5.1.4 allows remote attackers trigger
    an out of memory exception or denial of service via a gif format file. (CVE-2021-40633)

  - giflib v5.2.1 was discovered to contain a segmentation fault via the component getarg.c. (CVE-2023-39742)

  - Buffer Overflow vulnerability in GifLib Project GifLib v.5.2.1 allows a local attacker to obtain sensitive
    information via the DumpSCreen2RGB function in gif2rgb.c (CVE-2023-48161)

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

  - A memory leak (out-of-memory) in gif2rgb in util/gif2rgb.c in giflib 5.1.4 allows remote attackers trigger     an out of memory exception or denial of service via a gif format file. (CVE-2021-40633)

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

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 23.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6824-1 advisory.

    It was discovered that GIFLIB incorrectly handled certain GIF files. An attacker could possibly use this     issue to cause a denial of service. (CVE-2021-40633, CVE-2022-28506, CVE-2023-39742)

Tenable has extracted the preceding description block directly from the Ubuntu 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 remote SUSE Linux SLES12 / SLES_SAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:1622-1 advisory.

    - CVE-2018-11490: Fixed a heap-based buffer overflow in DGifDecompressLine() (bsc#1094832)
    - CVE-2021-40633: Fixed a denial of service from excessive memory (bsc#1200551)

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

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

According to the versions of the giflib packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - A memory leak (out-of-memory) in gif2rgb in util/gif2rgb.c in giflib 5.1.4 allows remote attackers trigger     an out of memory exception or denial of service via a gif format file. (CVE-2021-40633)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:0786-1 advisory.

    Update to version 5.2.2

    * Fixes for CVE-2023-48161 (bsc#1217390), CVE-2022-28506 (bsc#1198880)
    * #138 Documentation for obsolete utilities still installed
    * #139: Typo in 'LZW image data' page ('110_2 = 4_10')
    * #140: Typo in 'LZW image data' page ('LWZ')
    * #141: Typo in 'Bits and bytes' page ('filed')
    * Note as already fixed SF issue #143: cannot compile under mingw
    * #144: giflib-5.2.1 cannot be build on windows and other platforms using c89
    * #145: Remove manual pages installation for binaries that are not installed too
    * #146: [PATCH] Limit installed man pages to binaries, move giflib to section 7
    * #147 [PATCH] Fixes to doc/whatsinagif/ content
    * #148: heap Out of Bound Read in gif2rgb.c:298 DumpScreen2RGB
    * Declared no-info on SF issue #150: There is a denial of service vulnerability in GIFLIB 5.2.1
    * Declared Won't-fix on SF issue 149: Out of source builds no longer possible
    * #151: A heap-buffer-overflow in gif2rgb.c:294:45
    * #152: Fix some typos on the html documentation and man pages
    * #153: Fix segmentation faults due to non correct checking for args
    * #154: Recover the giffilter manual page
    * #155: Add gifsponge docs
    * #157: An OutofMemory-Exception or Memory Leak in gif2rgb
    * #158: There is a null pointer problem in gif2rgb
    * #159 A heap-buffer-overflow in GIFLIB5.2.1 DumpScreen2RGB() in gif2rgb.c:298:45
    * #163: detected memory leaks in openbsd_reallocarray giflib/openbsd-reallocarray.c
    * #164: detected memory leaks in GifMakeMapObject giflib/gifalloc.c
    * #166: a read zero page leads segment fault in getarg.c and memory leaks in gif2rgb.c and gifmalloc.c
    * #167: Heap-Buffer Overflow during Image Saving in DumpScreen2RGB Function at Line 321 of gif2rgb.c

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

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

ID	Name	Product	Family	Severity
295640	Azure Linux 3.0 Security Update: giflib (CVE-2021-40633)	Nessus	Azure Linux Local Security Checks	high
265073	Amazon Linux 2 : giflib, --advisory ALAS2-2025-2998 (ALAS-2025-2998)	Nessus	Amazon Linux Local Security Checks	high
239107	TencentOS Server 4: giflib (TSSA-2024:0479)	Nessus	Tencent Local Security Checks	high
423947	Alpine: multiple giflib packages: security update to 5.2.2-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	high
423947	Alpine: multiple giflib packages: security update to 5.2.2-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	high
224203	Linux Distros Unpatched Vulnerability : CVE-2021-40633	Nessus	Misc.	high
200257	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 23.10 : GIFLIB vulnerabilities (USN-6824-1)	Nessus	Ubuntu Local Security Checks	high
196941	SUSE SLES12 Security Update : giflib (SUSE-SU-2024:1622-1)	Nessus	SuSE Local Security Checks	high
193017	EulerOS 2.0 SP9 : giflib (EulerOS-SA-2024-1485)	Nessus	Huawei Local Security Checks	high
193015	EulerOS 2.0 SP9 : giflib (EulerOS-SA-2024-1506)	Nessus	Huawei Local Security Checks	high
191698	SUSE SLED15: giflib-devel / giflib-devel-32bit / giflib-progs / libgif7 / etc (SUSE-SU-2024:0786-1)	Nessus	SuSE Local Security Checks	high

Detections

Analytics

CVE-2021-40633

high

Tenable Plugins

high

high

high

high

high

high

high

high

high

high

high