Vulnerability Name:

CVE-2017-18243 (CCN-140681)

Assigned:2017-12-02
Published:2017-12-02
Updated:2018-04-18
Summary:The unpack_parse_unit function in libavcodec/dirac_parser.c in Libav 12.2 allows remote attackers to cause a denial of service (segmentation fault) via a crafted file.
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:U/RC:R)
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
3.3 Low (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)
2.9 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:U/RC:R)
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): None
Integrity (I): None
Availibility (A): Low
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
1.7 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-119
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2017-18243

Source: CCN
Type: Bugzilla – Bug 1088
Read invalid address caused SEGV in dirac_parser.c

Source: MISC
Type: Issue Tracking, Third Party Advisory
https://bugzilla.libav.org/show_bug.cgi?id=1088

Source: XF
Type: UNKNOWN
libav-cve201718243-dos(140681)

Source: CCN
Type: Libav Web site
Libav

Vulnerable Configuration:Configuration 1:
  • cpe:/a:libav:libav:12.2:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:libav:libav:12.2:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.artful:def:201718243000
    V
    		CVE-2017-18243 on Ubuntu 17.10 (artful) - medium.
    2018-03-22
    oval:com.ubuntu.bionic:def:201718243000
    V
    		CVE-2017-18243 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-03-22
    oval:com.ubuntu.trusty:def:201718243000
    V
    		CVE-2017-18243 on Ubuntu 14.04 LTS (trusty) - low.
    2018-03-22
    oval:com.ubuntu.xenial:def:201718243000
    V
    		CVE-2017-18243 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-03-22
    BACK
    libav libav 12.2
    libav libav 12.2