CVE-2021-27645
Published: 24 February 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.
Notes
| Author | Note |
|---|---|
| mdeslaur | introduced in 2.29 by: https://sourceware.org/git/?p=glibc.git;a=commit;h=745664bd798ec8fd50438605948eea594179fba1 introduced in 2.28-1 debian packaging by: https://salsa.debian.org/glibc-team/glibc/-/commit/aea56157b456d4d9bef337d0149e952a41a7d919 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
eglibc Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| hirsute |
Does not exist
|
|
| impish |
Does not exist
|
|
| jammy |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
| mantic |
Does not exist
|
|
| trusty |
Not vulnerable
(code not present)
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
|
glibc Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
| focal |
Released
(2.31-0ubuntu9.7)
|
|
| groovy |
Ignored
(end of life)
|
|
| hirsute |
Not vulnerable
(2.33-0ubuntu5)
|
|
| impish |
Not vulnerable
(2.33-0ubuntu5)
|
|
| jammy |
Not vulnerable
(2.33-0ubuntu5)
|
|
| kinetic |
Not vulnerable
(2.33-0ubuntu5)
|
|
| lunar |
Not vulnerable
(2.33-0ubuntu5)
|
|
| mantic |
Not vulnerable
(2.33-0ubuntu5)
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Needs triage
|
|
|
Patches: upstream: https://sourceware.org/git/?p=glibc.git;a=commit;h=dca565886b5e8bd7966e15f0ca42ee5cff686673 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 2.5 |
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | Low |
| Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L |