CVE-2021-3405 — Out-of-bounds Write in Libebml

CWE-787 — Out-of-bounds WriteCWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer5 documents5 sources
Severity
6.5MEDIUMNVD
EPSS
1.5%
top 19.01%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Matroska LibebmlDebian LinuxFedoraproject Fedora
Timeline
PublishedFeb 23
Latest updateMay 24

Description

A flaw was found in libebml before 1.4.2. A heap overflow bug exists in the implementation of EbmlString::ReadData and EbmlUnicodeString::ReadData in libebml.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages3 packages

▶NVDmatroska/libebml< 1.4.2
▶Debianmatroska/libebml< 1.4.2-1+3
▶CVEListV5matroska/libebmlbefore 1.4.2

Also affects: Debian Linux 9.0, Fedora 32, 33, 34

🔴Vulnerability Details

3
GHSA
GHSA-xc72-rxv8-3m23: A flaw was found in libebml before 1↗2022-05-24
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CVEList
CVE-2021-3405: A flaw was found in libebml before 1↗2021-02-23
▶
OSV
CVE-2021-3405: A flaw was found in libebml before 1↗2021-02-23
▶

📋Vendor Advisories

1
Debian
CVE-2021-3405: libebml - A flaw was found in libebml before 1.4.2. A heap overflow bug exists in the impl...↗2021
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CVE-2021-3405 — Out-of-bounds Write in Matroska Libebml | cvebase