CVE-2021-27645

EPSS 0.04%
Published 24.02.2021 15:15:13
Last modified 09.06.2025 15:15:25
Source cve@mitre.org
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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.

Affected products Warnungen 0 Metrics 4 CWE 1 References 8

Data is provided by the National Vulnerability Database (NVD)

Gnu ≫ Glibc Version >= 2.29 <= 2.33

Fedoraproject ≫ Fedora Version33

Fedoraproject ≫ Fedora Version34

Debian ≫ Debian Linux Version10.0

Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.

EPSS Metriken
Type	Source	Score	Percentile
EPSS	FIRST.org	0.04%	0.097

CVSS Metriken
Source	Base Score	Exploit Score	Impact Score	Vector string
nvd@nist.gov	2.5	1	1.4	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
nvd@nist.gov	1.9	3.4	2.9	AV:L/AC:M/Au:N/C:N/I:N/A:P
134c704f-9b21-4f2e-91b3-4a467353bcc0	2.5	1	1.4	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

CWE-415 Double Free

The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations.

https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html

Third Party Advisory

Mailing List

https://security.gentoo.org/glsa/202107-07

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/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/

https://sourceware.org/bugzilla/show_bug.cgi?id=27462

Patch

Third Party Advisory

Issue Tracking

https://nvd.nist.gov/vuln/detail/CVE-2021-27645

CVE Source (NVD)

https://cveawg.mitre.org/api/cve/CVE-2021-27645

CVE Source (JSON)

https://euvd.enisa.europa.eu/vulnerability/CVE-2021-27645

EUVD