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CVE-2021-3405

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Date: February 23, 2021

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.

Language: C++

Severity Score

6.5

Related Resources (13)

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UHIIMWZKHHELFF4NRDMOOCS3HKK3K4DF/

Url: https://nvd.nist.gov/vuln/detail/CVE-2021-3405

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JNHQI6MDOECJ2HT5GCLEX2DMJFEOWPW7/

Url: https://security-tracker.debian.org/tracker/CVE-2021-3405

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JNHQI6MDOECJ2HT5GCLEX2DMJFEOWPW7/

Url: https://security.gentoo.org/glsa/202208-21

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YY7R2JZRO5I6WS62KTJFTZGKYELVFTVB/

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YY7R2JZRO5I6WS62KTJFTZGKYELVFTVB/

Url: https://github.com/Matroska-Org/libebml/issues/74

Url: https://lists.debian.org/debian-lts-announce/2021/04/msg00016.html

Url: https://security.alpinelinux.org/vuln/CVE-2021-3405

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHIIMWZKHHELFF4NRDMOOCS3HKK3K4DF/

Url: https://www.mend.io/vulnerability-database/CVE-2021-3405

Severity Score

6.5

Weakness Type (CWE)

Buffer Errors

CWE-119

Out-of-bounds Write

CWE-787

Top Fix

Upgrade Version

Upgrade to version release-1.4.2

CVSS v3.1

Base Score:	6.5
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	REQUIRED
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	HIGH

CVSS v2

Base Score:	4.3
Access Vector (AV):	NETWORK
Access Complexity (AC):	MEDIUM
Authentication (AU):	NONE
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	PARTIAL
Additional information:

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