PT-2021-21417 · Unknown · Unicorn Engine

Published 2021-07-20 · Updated 2021-12-03 · CVE-2021-36979

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Unicorn Engine version 1.0.2

Description The issue is an out-of-bounds write in the tb flush armeb function, which is called from cpu arm exec armeb and tcg cpu exec armeb.

Recommendations For Unicorn Engine version 1.0.2, consider disabling the tb flush armeb function as a temporary workaround until a patch is available. Restrict access to the functions cpu arm exec armeb and tcg cpu exec armeb to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-36979

Affected Products

Unicorn Engine

References · 8

• https://github.com/unicorn-engine/unicorn/commit/bf1713d9e011b55ca1f502a6779fc4722b4bb077 · Patch
• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=30391 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-36979 · Security Note
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MZ6LOCJXHQVU6SCJLFDJINBOVJYYENLX · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-36979 · Vendor Advisory
• https://github.com/google/oss-fuzz-vulns/blob/main/vulns/unicorn/OSV-2020-2305.yaml · Note
• https://t.me/cvenotify/17907 · Telegram Post
• https://t.me/cibsecurity/26276 · Telegram Post