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CVE-2021-27645

Date: February 23, 2021

The nameserver caching daemon (nscd) in the GNU C Library (aka glibc or libc6) 2.29 through 2.33, when processing a request for netgroup lookup, may crash due to a double-free, potentially resulting in degraded service or Denial of Service on the local system. This is related to netgroupcache.c.

Language: PHP

Severity Score

Related Resources (12)

https://nvd.nist.gov/vuln/detail/CVE-2021-27645
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/
https://sourceware.org/bugzilla/show_bug.cgi?id=27462
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/
https://security-tracker.debian.org/tracker/CVE-2021-27645
https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html
https://security.gentoo.org/glsa/202107-07
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-27645
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/
https://access.redhat.com/security/cve/CVE-2021-27645
https://www.mend.io/vulnerability-database/CVE-2021-27645

Severity Score

Weakness Type (CWE)

Double Free

CWE-415

CVSS v3.1

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

CVSS v2

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

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