CVE-2021-31806
Squid HTTP Range Request Denial of Service Vulnerability
Description
An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a memory-management bug, it is vulnerable to a Denial of Service attack (against all clients using the proxy) via HTTP Range request processing.
INFO
Published Date :
May 27, 2021, 1:15 p.m.
Last Modified :
Nov. 7, 2023, 3:35 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.8
Public PoC/Exploit Available at Github
CVE-2021-31806 has a 1 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-2021-31806
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-2021-31806.
| URL | Resource |
|---|---|
| http://seclists.org/fulldisclosure/2023/Oct/14 | Mailing List Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2023/10/11/3 | Mailing List Third Party Advisory |
| http://www.squid-cache.org/Versions/v4/changesets/squid-4-e7cf864f938f24eea8af0692c04d16790983c823.patch | Patch Vendor Advisory |
| https://github.com/squid-cache/squid/security/advisories/GHSA-pxwq-f3qr-w2xf | Patch Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2021/06/msg00014.html | Mailing List Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF/ | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T4EPIWUZDJAXADDHVOPKRBTQHPBR6H66/ | |
| https://security.netapp.com/advisory/ntap-20210716-0007/ | Third Party Advisory |
| https://www.debian.org/security/2021/dsa-4924 | 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).
A detailed repository of vulnerabilities that I discovered in The Squid Caching Proxy.
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-31806 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-31806 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/LSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF/ [No types assigned] Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T4EPIWUZDJAXADDHVOPKRBTQHPBR6H66/ [No types assigned] Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/T4EPIWUZDJAXADDHVOPKRBTQHPBR6H66/ Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/LSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF/ -
Modified Analysis by [email protected]
Oct. 24, 2023
Action Type Old Value New Value Changed Reference Type http://seclists.org/fulldisclosure/2023/Oct/14 No Types Assigned http://seclists.org/fulldisclosure/2023/Oct/14 Mailing List, Third Party Advisory Changed Reference Type http://www.openwall.com/lists/oss-security/2023/10/11/3 No Types Assigned http://www.openwall.com/lists/oss-security/2023/10/11/3 Mailing List, Third Party Advisory -
CVE Modified by [email protected]
Oct. 17, 2023
Action Type Old Value New Value Added Reference http://seclists.org/fulldisclosure/2023/Oct/14 [No Types Assigned] -
CVE Modified by [email protected]
Oct. 11, 2023
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2023/10/11/3 [No Types Assigned] -
Modified Analysis by [email protected]
Sep. 14, 2021
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2021/06/msg00014.html No Types Assigned https://lists.debian.org/debian-lts-announce/2021/06/msg00014.html Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/LSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/LSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF/ Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/T4EPIWUZDJAXADDHVOPKRBTQHPBR6H66/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/T4EPIWUZDJAXADDHVOPKRBTQHPBR6H66/ Mailing List, Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20210716-0007/ No Types Assigned https://security.netapp.com/advisory/ntap-20210716-0007/ Third Party Advisory Changed CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:netapp:cloud_manager:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jul. 16, 2021
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20210716-0007/ [No Types Assigned] -
CVE Modified by [email protected]
Jun. 14, 2021
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2021/06/msg00014.html [No Types Assigned] -
CVE Modified by [email protected]
Jun. 11, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/T4EPIWUZDJAXADDHVOPKRBTQHPBR6H66/ [No Types Assigned] Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/LSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF/ [No Types Assigned] -
Reanalysis by [email protected]
Jun. 09, 2021
Action Type Old Value New Value Removed CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:N/I:N/A:P) Removed CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H -
Initial Analysis by [email protected]
Jun. 09, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type http://www.squid-cache.org/Versions/v4/changesets/squid-4-e7cf864f938f24eea8af0692c04d16790983c823.patch No Types Assigned http://www.squid-cache.org/Versions/v4/changesets/squid-4-e7cf864f938f24eea8af0692c04d16790983c823.patch Patch, Vendor Advisory Changed Reference Type https://github.com/squid-cache/squid/security/advisories/GHSA-pxwq-f3qr-w2xf No Types Assigned https://github.com/squid-cache/squid/security/advisories/GHSA-pxwq-f3qr-w2xf Patch, Third Party Advisory Changed Reference Type https://www.debian.org/security/2021/dsa-4924 No Types Assigned https://www.debian.org/security/2021/dsa-4924 Third Party Advisory Added CWE NIST CWE-116 Added CPE Configuration OR *cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* versions up to (excluding) 4.15 *cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* versions from (including) 5.0 up to (excluding) 5.0.6 Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jun. 02, 2021
Action Type Old Value New Value Added Reference https://www.debian.org/security/2021/dsa-4924 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-31806 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-2021-31806
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
91.62 }} -1.09%
score
0.98894
percentile