CVE-2021-27645 Information

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 Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

Reference

https://sourceware.org/bugzilla/show_bug.cgi?id=27462 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/ https://security.gentoo.org/glsa/202107-07

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

LOW

Base Severity

2.5