Libsixel
CVE-2021-45340
MEDIUM
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Lifecycle Timeline
1DescriptionCVE.org
In Libsixel prior to and including v1.10.3, a NULL pointer dereference in the stb_image.h component of libsixel allows attackers to cause a denial of service (DOS) via a crafted PICT file.
AnalysisAI
In Libsixel prior to and including v1.10.3, a NULL pointer dereference in the stb_image.h component of libsixel allows attackers to cause a denial of service (DOS) via a crafted PICT file. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Technical ContextAI
This vulnerability is classified as NULL Pointer Dereference (CWE-476), which allows attackers to crash the application by dereferencing a null pointer. In Libsixel prior to and including v1.10.3, a NULL pointer dereference in the stb_image.h component of libsixel allows attackers to cause a denial of service (DOS) via a crafted PICT file. Affected products include: Libsixel.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Check pointers before dereferencing. Use static analysis tools to detect null pointer paths.
An issue was discovered in libsixel 1.8.4. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, n
An issue was discovered in libsixel 1.8.4. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, n
libsixel 1.8.4 has an integer overflow in sixel_frame_resize in frame.c. Rated high severity (CVSS 8.8), this vulnerabil
libsixel 1.10.0 is vulnerable to Use after free in libsixel/src/dither.c:379. Rated high severity (CVSS 8.8), this vulne
Libsixel 1.8.3 contains a heap-based buffer overflow in the sixel_encode_highcolor function in tosixel.c. Rated high sev
Libsixel 1.8.2 contains a heap-based buffer overflow in the dither_func_fs function in tosixel.c. Rated high severity (C
An issue was discovered in libsixel 1.8.2. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, n
stb_image.h (aka the stb image loader) 2.23, as used in libsixel and other products, has a heap-based buffer over-read i
libsixel before 1.10 is vulnerable to Buffer Overflow in libsixel/src/quant.c:867. Rated high severity (CVSS 8.8), this
libsixel 1.8.6 is affected by Buffer Overflow in libsixel/src/quant.c:876. Rated high severity (CVSS 8.8), this vulnerab
libsixel 1.8.6 suffers from a Heap Use After Free vulnerability in in libsixel/src/dither.c:388. Rated high severity (CV
In libsixel v1.8.2, there is a heap-based buffer over-read in the function load_jpeg() in the file loader.c, as demonstr
Same weakness CWE-476 – NULL Pointer Dereference
View allSame technique Denial Of Service
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External POC / Exploit Code
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