PT-2021-4588 · Libebml+1 · Libebml+1

Kryco · Published 2021-02-07 · Updated 2023-08-15 · CVE-2021-3405

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions libebml versions prior to 1.4.2

Description A flaw was found in the implementation of the EbmlString::ReadData and EbmlUnicodeString::ReadData functions in libebml, which can cause a heap overflow error. This issue is related to writing beyond buffer boundaries. Exploitation of this flaw may allow a remote attacker to cause a denial of service.

Recommendations For versions prior to 1.4.2, update to version 1.4.2 or later to resolve the issue. As a temporary workaround, consider restricting the use of the EbmlString::ReadData and EbmlUnicodeString::ReadData functions until a patch is available.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

ALT-PU-2021-1489

ALT-PU-2023-4803

BDU:2021-05267

CVE-2021-3405

DLA-2629-1

MGASA-2021-0226

MGASA-2021-0338

OPENSUSE-SU-2024:10937-1

Affected Products

Alt Linux

Libebml

References · 34

• 🔥 https://github.com/Matroska-Org/libebml/issues/74 · Exploit
• https://wiki.astralinux.ru/astra-linux-se81-bulletin-20230315SE81 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-3405 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-3405 · Security Note
• https://osv.dev/vulnerability/DLA-2629-1 · Vendor Advisory
• https://security.gentoo.org/glsa/202208-21 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/thread/JNHQI6MDOECJ2HT5GCLEX2DMJFEOWPW7 · Vendor Advisory
• https://debian.org/lts/security/2021/dla-2629 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-3405 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-05267 · Security Note
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JNHQI6MDOECJ2HT5GCLEX2DMJFEOWPW7 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-3405 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2021-0338 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-3405 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YY7R2JZRO5I6WS62KTJFTZGKYELVFTVB · Vendor Advisory