Back to Database
Status published
Medium
CVE-2020-21048
An issue in the dither.c component of libsixel prior to...
Vulnerability Description
An issue in the dither.c component of libsixel prior to v1.8.4 allows attackers to cause a denial of service (DOS) via a crafted PNG file.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
THREAT MONITOR
Am I Vulnerable?
Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2020-21048
Credits & Attribution
No credits recorded in the NVD database.
References
- https://github.com/saitoha/libsixel/issues/73
- https://github.com/saitoha/libsixel/commit/cb373ab6614c910407c5e5a93ab935144e62b037
- https://github.com/saitoha/libsixel/releases/tag/v1.8.4
- https://github.com/saitoha/libsixel/blob/master/ChangeLog
- https://bitbucket.org/netbsd/pkgsrc/commits/6f0c011cbfccdffa635d04c84433b1a02687adad
More from saitoha
View All →CVE-2025-9300
saitoha libsixel img2sixel encoder.c sixel_debug_print_palette stack-based overflow
Medium
4.8
CVE-2022-29978
There is a floating point exception error in sixel_encoder_do_resize, encoder.c:633...
Medium
6.5
CVE-2022-29977
There is an assertion failure error in stbi__jpeg_huff_decode, stb_image.h:1894 in...
Medium
6.5
CVE-2022-27046
libsixel 1.8.6 suffers from a Heap Use After Free vulnerability...
High
8.8
CVE-2022-27044
libsixel 1.8.6 is affected by Buffer Overflow in libsixel/src/quant.c:876....
High
8.8
Affected Vendor
saitoha
View all reports →Affected Software
libsixel
Vulnerable Versions:
0
Timeline
Official Publish:
September 14th, 2021
Last Modified:
August 4th, 2024
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.