CVE-2021-32740
Ruby's Addressable URI Template Denial of Service Vulnerability
Description
Addressable is an alternative implementation to the URI implementation that is part of Ruby's standard library. An uncontrolled resource consumption vulnerability exists after version 2.3.0 through version 2.7.0. Within the URI template implementation in Addressable, a maliciously crafted template may result in uncontrolled resource consumption, leading to denial of service when matched against a URI. In typical usage, templates would not normally be read from untrusted user input, but nonetheless, no previous security advisory for Addressable has cautioned against doing this. Users of the parsing capabilities in Addressable but not the URI template capabilities are unaffected. The vulnerability is patched in version 2.8.0. As a workaround, only create Template objects from trusted sources that have been validated not to produce catastrophic backtracking.
INFO
Published Date :
July 6, 2021, 3:15 p.m.
Last Modified :
Nov. 7, 2023, 3:35 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2021-32740 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-2021-32740
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-2021-32740.
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).
List of RegEx DoS (ReDoS) CVEs and resources
security awesome redos regex dos regex-dos pentesting awesome-list regex-security
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-32740 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-32740 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 GitHub, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WYPVOOQU7UB277UUERJMCNQLRCXRCIQ5/ [No types assigned] Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SDFQM2NHNAZ3NNUQZEJTYECYZYXV4UDS/ [No types assigned] Removed Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/WYPVOOQU7UB277UUERJMCNQLRCXRCIQ5/ Removed Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/SDFQM2NHNAZ3NNUQZEJTYECYZYXV4UDS/ -
Modified Analysis by [email protected]
Sep. 21, 2021
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/SDFQM2NHNAZ3NNUQZEJTYECYZYXV4UDS/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/SDFQM2NHNAZ3NNUQZEJTYECYZYXV4UDS/ Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/WYPVOOQU7UB277UUERJMCNQLRCXRCIQ5/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/WYPVOOQU7UB277UUERJMCNQLRCXRCIQ5/ Mailing List, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Aug. 27, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/WYPVOOQU7UB277UUERJMCNQLRCXRCIQ5/ [No Types Assigned] Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/SDFQM2NHNAZ3NNUQZEJTYECYZYXV4UDS/ [No Types Assigned] -
Initial Analysis by [email protected]
Jul. 12, 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 https://github.com/sporkmonger/addressable/commit/0d8a3127e35886ce9284810a7f2438bff6b43cbc No Types Assigned https://github.com/sporkmonger/addressable/commit/0d8a3127e35886ce9284810a7f2438bff6b43cbc Patch, Release Notes, Third Party Advisory Changed Reference Type https://github.com/sporkmonger/addressable/security/advisories/GHSA-jxhc-q857-3j6g No Types Assigned https://github.com/sporkmonger/addressable/security/advisories/GHSA-jxhc-q857-3j6g Third Party Advisory Added CWE NIST CWE-400 Added CPE Configuration OR *cpe:2.3:a:addressable_project:addressable:*:*:*:*:*:ruby:*:* versions from (including) 2.3.0 up to (excluding) 2.8.0
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-32740 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-2021-32740
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.25 }} 0.10%
score
0.64455
percentile