Vulnerability Description
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.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Glibc | >= 2.29, <= 2.33 |
| Fedoraproject | Fedora | 33 |
| Debian | Debian Linux | 10.0 |
Related Weaknesses (CWE)
References
- https://lists.debian.org/debian-lts-announce/2022/10/msg00021.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202107-07Third Party Advisory
- https://sourceware.org/bugzilla/show_bug.cgi?id=27462Issue TrackingPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/10/msg00021.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202107-07Third Party Advisory
- https://sourceware.org/bugzilla/show_bug.cgi?id=27462Issue TrackingPatchThird Party Advisory
FAQ
What is CVE-2021-27645?
CVE-2021-27645 is a vulnerability with a CVSS score of 2.5 (LOW). 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 i...
How severe is CVE-2021-27645?
CVE-2021-27645 has been rated LOW with a CVSS base score of 2.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-27645?
Check the references section above for vendor advisories and patch information. Affected products include: Gnu Glibc, Fedoraproject Fedora, Debian Debian Linux.