CVE-2021-27645

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-27645
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.

2.5 /10

CVSS v3.0 : LOW

V3 Legend

Vector :

Exploitability : 1.0 / Impact : 1.4

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

1.9 /10

CVSS v2.0 : LOW

V2 Legend

Vector : AV:L/AC:M/Au:N/C:N/I:N/A:P

Exploitability : 3.4 / Impact : 2.9

Access Vector LOCAL

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References
Link Resource
https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/
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/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/
https://security.gentoo.org/glsa/202107-07 Third Party Advisory
https://security.gentoo.org/glsa/202107-07 Third Party Advisory
https://sourceware.org/bugzilla/show_bug.cgi?id=27462 Issue Tracking Patch Third Party Advisory
https://sourceware.org/bugzilla/show_bug.cgi?id=27462 Issue Tracking Patch Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

Configuration 3 (hide)

cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
History

09 Jun 2025, 15:15

Type Values Removed Values Added
References (GENTOO) https://security.gentoo.org/glsa/202107-07 - Third Party Advisory () https://security.gentoo.org/glsa/202107-07 - Third Party Advisory
References (MLIST) https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html - Mailing List, Third Party Advisory () https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html - Mailing List, Third Party Advisory
References (MISC) https://sourceware.org/bugzilla/show_bug.cgi?id=27462 - Issue Tracking, Patch, Third Party Advisory () https://sourceware.org/bugzilla/show_bug.cgi?id=27462 - Issue Tracking, Patch, Third Party Advisory

07 Nov 2023, 03:31

Type Values Removed Values Added
References
  • {'url': 'https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/', 'name': 'FEDORA-2021-2ba993d6c5', 'tags': ['Mailing List', 'Third Party Advisory'], 'refsource': 'FEDORA'}
  • {'url': 'https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/', 'name': 'FEDORA-2021-6749bfcfd9', 'tags': ['Mailing List', 'Third Party Advisory'], 'refsource': 'FEDORA'}
  • () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/ -
  • () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/ -
Information

Published : 2021-02-24 15:15

Updated : 2025-06-09 15:15

NVD link : CVE-2021-27645

Mitre link : CVE-2021-27645

JSON object : View

Products Affected

debian

  • debian_linux

gnu

  • glibc

fedoraproject

  • fedora
CWE
CWE-415

Double Free