Vulnerability Name:

CVE-2020-21674 (CCN-189936)

Assigned:2019-12-28
Published:2019-12-28
Updated:2020-10-26
Summary:Heap-based buffer overflow in archive_string_append_from_wcs() (archive_string.c) in libarchive-3.4.1dev allows remote attackers to cause a denial of service (out-of-bounds write in heap memory resulting into a crash) via a crafted archive file.
Note: this only affects users who downloaded the development code from GitHub. Users of the product's official releases are unaffected.
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
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: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): 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-787
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2020-21674

Source: XF
Type: UNKNOWN
libarchive-cve202021674-dos(189936)

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/libarchive/libarchive/commit/4f085eea879e2be745f4d9bf57e8513ae48157f4

Source: CCN
Type: libarchive GIT Repository
Heap-buffer-overflow in archive_string_append_from_wcs() (archive_string.c) #1298

Source: MISC
Type: Third Party Advisory
https://github.com/libarchive/libarchive/issues/1298

Source: CCN
Type: IBM Security Bulletin 6833582 (Cloud Pak for Security)
IBM Cloud Pak for Security is vulnerable to using components with known vulnerabilities

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2020-21674

Vulnerable Configuration:Configuration 1:
  • cpe:/a:libarchive:libarchive:3.4.1:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:libarchive:libarchive:3.4.1:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    libarchive libarchive 3.4.1
    libarchive libarchive 3.4.1