PT-2021-21281 · Giflib · Giflib

Marsman1996 · Published 2021-08-27 · Updated 2021-09-07 · CVE-2021-36530

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions ngiflib version 0.4

Description The issue is a heap overflow in the GetByteStr() function at ngiflib.c:108 when in NGIFLIB NO FILE mode. This occurs because GetByteStr() copies a memory buffer without checking its boundary, leading to potential exploitation.

Recommendations For ngiflib version 0.4, as a temporary workaround, consider disabling the GetByteStr() function until a patch is available. Restrict access to the ngiflib.c file, specifically the GetByteStr() function at line 108, to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-36530

Affected Products

Giflib

References · 5

• 🔥 https://github.com/miniupnp/ngiflib/issues/19 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-36530 · Security Note
• https://osv.dev/vulnerability/CVE-2021-36530 · Vendor Advisory
• https://t.me/cibsecurity/27952 · Telegram Post
• https://t.me/cvenotify/20266 · Telegram Post