CVE-2020-21548

Libsixel 1.8.3 contains a heap-based buffer overflow in the sixel_encode_highcolor function in tosixel.c.

CVSS v3.1

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2.0

6.8 MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P

EPSS

1.07% chance of exploitation in the next 30 days, 62th percentile

Published

2021-09-17

Updated

2024-08-04

Proof-of-concept exploits (1)

• saitoha/libsixel/issues/116

References

• CVE Record
• NVD entry

Related

• CVE-2019-11024
• CVE-2019-19777
• CVE-2019-19778
• CVE-2019-20022
• CVE-2019-20023
• CVE-2019-20024