Vulnerability Name:

CVE-2021-3405 (CCN-197317)

Assigned:2021-02-07
Published:2021-02-07
Updated:2022-09-30
Summary: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 v3 Severity:6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
7.8 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
6.8 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
6.8 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-787
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2021-3405

Source: XF
Type: UNKNOWN
matroska-cve20213405-bo(197317)

Source: CCN
Type: libebml GIT Repository
Ebml[Unicode]String::ReadData heap overflow bug on 32bit builds #74

Source: MISC
Type: Exploit, Issue Tracking, Third Party Advisory
https://github.com/Matroska-Org/libebml/issues/74

Source: MLIST
Type: Third Party Advisory
[debian-lts-announce] 20210418 [SECURITY] [DLA 2629-1] libebml security update

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-aa78f97893

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-e283997bb9

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-9a0fff8455

Source: GENTOO
Type: Third Party Advisory
GLSA-202208-21

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2021-3405

Vulnerable Configuration:Configuration 1:
  • cpe:/a:matroska:libebml:*:*:*:*:*:*:*:* (Version < 1.4.2)

    • Configuration 2:
  • cpe:/o:fedoraproject:fedora:32:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:33:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:34:*:*:*:*:*:*:*

    • Configuration 3:
  • cpe:/o:debian:debian_linux:9.0:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:matroska:libebml:1.4.1:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:112620
    P
    		libebml-devel-1.4.2-2.3 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:106103
    P
    		libebml-devel-1.4.2-2.3 on GA media (Moderate)
    2021-10-01
    BACK
    matroska libebml *
    fedoraproject fedora 32
    fedoraproject fedora 33
    fedoraproject fedora 34
    debian debian linux 9.0
    matroska libebml 1.4.1