Vulnerability Name:

CVE-2020-13132 (CCN-184964)

Assigned:2020-07-08
Published:2020-07-08
Updated:2021-07-21
Summary:An issue was discovered in Yubico libykpiv before 2.1.0. An attacker can trigger an incorrect free() in the ykpiv_util_generate_key() function in lib/util.c through incorrect error handling code. This could be used to cause a denial of service attack.
CVSS v3 Severity:4.6 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
4.0 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Physical
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
4.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)
3.8 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:P/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): Physical
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
CVSS v2 Severity:2.1 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-327
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2020-13132

Source: MISC
Type: Exploit, Third Party Advisory
https://blog.inhq.net/posts/yubico-libykpiv-vuln/

Source: XF
Type: UNKNOWN
yubico-cve202013132-dos(184964)

Source: CCN
Type: Yubico Security Advisory YSA-2020-02
Out of bounds read in libykpiv

Source: CONFIRM
Type: Vendor Advisory
https://www.yubico.com/support/security-advisories/ysa-2020-02/

Vulnerable Configuration:Configuration 1:
  • cpe:/a:yubico:libykpiv:*:*:*:*:*:*:*:* (Version < 2.1.0)

    • Configuration 2:
  • cpe:/a:yubico:piv_tool_manager:*:*:*:*:*:*:*:* (Version < 2.0.0)

    • Configuration 3:
  • cpe:/a:yubico:yubikey_smart_card_minidriver:*:*:*:*:*:*:*:* (Version <= 4.1.0.172)

    • * Denotes that component is vulnerable
    BACK
    yubico libykpiv *
    yubico piv tool manager *
    yubico yubikey smart card minidriver *