CVE-2021-27645
GNU C Library (glibc) Netgroup Caching Daemon Double-Free Denial of Service 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.
INFO
Published Date :
Feb. 24, 2021, 3:15 p.m.
Last Modified :
Nov. 7, 2023, 3:31 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
1.4
Exploitability Score :
1.0
Public PoC/Exploit Available at Github
CVE-2021-27645 has a 4 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2021-27645
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-27645.
| URL | Resource |
|---|---|
| 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/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/ | |
| 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 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Random late night exercises
Dockerfile Shell Python HCL
None
Dockerfile Python HCL
Scan a list of container images using Aqua Security's trivy CLI tool
Shell
demo stuff
Dockerfile Rust Shell HCL
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-27645 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-27645 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/ [No types assigned] Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/ [No types assigned] Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/ Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/ -
Modified Analysis by [email protected]
Nov. 04, 2022
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html No Types Assigned https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html Mailing List, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Oct. 17, 2022
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html [No Types Assigned] -
Modified Analysis by [email protected]
May. 23, 2022
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/ Mailing List, Third Party Advisory Changed Reference Type https://security.gentoo.org/glsa/202107-07 No Types Assigned https://security.gentoo.org/glsa/202107-07 Third Party Advisory Changed CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jul. 06, 2021
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202107-07 [No Types Assigned] -
CVE Modified by [email protected]
May. 22, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/ [No Types Assigned] -
Modified Analysis by [email protected]
Mar. 25, 2021
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/ Mailing List, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Mar. 19, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/ [No Types Assigned] -
Reanalysis by [email protected]
Mar. 02, 2021
Action Type Old Value New Value Removed CVSS V2 NIST (AV:L/AC:L/Au:N/C:N/I:N/A:C) Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:N/I:N/A:P) Removed CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CVSS V3.1 NIST AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L -
Initial Analysis by [email protected]
Feb. 27, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:N/I:N/A:C) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://sourceware.org/bugzilla/show_bug.cgi?id=27462 No Types Assigned https://sourceware.org/bugzilla/show_bug.cgi?id=27462 Issue Tracking, Patch, Third Party Advisory Added CWE NIST CWE-415 Added CPE Configuration OR *cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:* versions from (including) 2.29 up to (including) 2.33
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-27645 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-27645
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.05 }} 0.00%
score
0.14406
percentile