CVE-2021-20270
Pygments SMLLexer Infinite Loop Denial of Service
Description
An infinite loop in SMLLexer in Pygments versions 1.5 to 2.7.3 may lead to denial of service when performing syntax highlighting of a Standard ML (SML) source file, as demonstrated by input that only contains the "exception" keyword.
INFO
Published Date :
March 23, 2021, 5:15 p.m.
Last Modified :
Dec. 10, 2021, 5:04 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2021-20270 has a 3 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-2021-20270
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-2021-20270.
| URL | Resource |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1922136 | Issue Tracking Patch Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html | Mailing List Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html | Mailing List Third Party Advisory |
| https://www.debian.org/security/2021/dsa-4889 | Third Party Advisory |
| https://www.oracle.com/security-alerts/cpuoct2021.html | Not Applicable 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).
None
CMake Shell Perl C++ C Batchfile CSS Makefile M4 Python
This tool is used for backdoor,shellcode generation,Information retrieval and POC arrangement for various architecture devices
iot security exploit linux python reverse-shell poc cve
Python Shell
None
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-20270 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-20270 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 -
Modified Analysis by [email protected]
Dec. 10, 2021
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html No Types Assigned https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html Mailing List, Third Party Advisory Changed Reference Type https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html No Types Assigned https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html Mailing List, Third Party Advisory Changed Reference Type https://www.debian.org/security/2021/dsa-4889 No Types Assigned https://www.debian.org/security/2021/dsa-4889 Third Party Advisory Changed Reference Type https://www.oracle.com/security-alerts/cpuoct2021.html No Types Assigned https://www.oracle.com/security-alerts/cpuoct2021.html Not Applicable, Third Party Advisory Added CWE NIST CWE-835 Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Oct. 20, 2021
Action Type Old Value New Value Added Reference https://www.oracle.com/security-alerts/cpuoct2021.html [No Types Assigned] -
CVE Modified by [email protected]
May. 06, 2021
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html [No Types Assigned] -
CVE Modified by [email protected]
May. 05, 2021
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html [No Types Assigned] -
CVE Modified by [email protected]
Apr. 11, 2021
Action Type Old Value New Value Added Reference https://www.debian.org/security/2021/dsa-4889 [No Types Assigned] -
Initial Analysis by [email protected]
Mar. 25, 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://bugzilla.redhat.com/show_bug.cgi?id=1922136 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1922136 Issue Tracking, Patch, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:pygments:pygments:*:*:*:*:*:*:*:* versions from (including) 1.5 up to (including) 2.7.3 Added CPE Configuration OR *cpe:2.3:a:redhat:openshift_container_platform:3.11:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openstack_platform:10.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:software_collections:-:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora: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-2021-20270 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-2021-20270
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.28 }} 0.04%
score
0.64988
percentile