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CVE-2021-20270

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2021-4139-03
Posted Nov 10, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4139-03 - The resource-agents packages provide the Pacemaker and RGManager service managers with a set of scripts. These scripts interface with several services to allow operating in a high-availability environment. Issues addressed include a denial of service vulnerability.

tags | advisory, denial of service
systems | linux, redhat
advisories | CVE-2021-20270, CVE-2021-27291
SHA-256 | 5f3ab996b9e01c3116634f0d259ffd99bb5d0a2ef34cdc6fcb2059cdfc3ef7de
Red Hat Security Advisory 2021-4151-06
Posted Nov 10, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4151-06 - Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Issues addressed include code execution, cross site scripting, denial of service, and traversal vulnerabilities.

tags | advisory, denial of service, vulnerability, code execution, xss, python
systems | linux, redhat
advisories | CVE-2020-27619, CVE-2020-28493, CVE-2021-20095, CVE-2021-20270, CVE-2021-23336, CVE-2021-27291, CVE-2021-28957, CVE-2021-42771
SHA-256 | d49d4e9cc1d8294a10ad07970c659f1d865063f8fbef9fec6dfcfdf770c16f00
Red Hat Security Advisory 2021-4150-02
Posted Nov 10, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4150-02 - Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Issues addressed include a denial of service vulnerability.

tags | advisory, denial of service, python
systems | linux, redhat
advisories | CVE-2021-20270, CVE-2021-27291
SHA-256 | ac4c0b5ed837e7faa003b2c8656928fbc253f3d4d8384eca13b1ec2b5e7302f8
Red Hat Security Advisory 2021-3252-01
Posted Aug 27, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3252-01 - Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Issues addressed include buffer overflow, code execution, denial of service, and traversal vulnerabilities.

tags | advisory, denial of service, overflow, vulnerability, code execution, python
systems | linux, redhat
advisories | CVE-2020-27619, CVE-2020-28493, CVE-2021-20095, CVE-2021-20270, CVE-2021-23336, CVE-2021-27291, CVE-2021-3177
SHA-256 | 05d8615e2ff62f71aec723a17e396003df102bd5b199b067ca9160421e948fe6
Debian Security Advisory 4889-1
Posted Apr 28, 2021
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4889-1 - Multiple security issues were found in MediaWiki, a website engine for collaborative work, which could result in incomplete page/blocking protection, denial of service or cross-site scripting.

tags | advisory, denial of service, xss
systems | linux, debian
advisories | CVE-2021-20270, CVE-2021-27291, CVE-2021-30152, CVE-2021-30154, CVE-2021-30155, CVE-2021-30157, CVE-2021-30158, CVE-2021-30159
SHA-256 | 49b1118e5e434a47257059a1f6acac6dd79c19b2654b3272799d4a74621cc53a
Debian Security Advisory 4870-1
Posted Mar 28, 2021
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4870-1 - It was discovered that Pygments, a syntax highlighting package written in Python, could be forced into an infinite loop, resulting in denial of service.

tags | advisory, denial of service, python
systems | linux, debian
advisories | CVE-2021-20270
SHA-256 | d168d6024abc57c2d5e0952783f82c23c49f389a219f0e26d52a7831ca39575b
Ubuntu Security Notice USN-4885-1
Posted Mar 22, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4885-1 - It was discovered that Pygments incorrectly handled parsing SML files. If a user or automated system were tricked into parsing a specially crafted SML file, a remote attacker could cause Pygments to hang, resulting in a denial of service.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2021-20270
SHA-256 | cf9c92c9eb6671be05dc716da1af0aeeec5c587a2c09dfac4f7ddf70476ffa13
Red Hat Security Advisory 2021-0781-01
Posted Mar 9, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0781-01 - Red Hat Ansible Automation Platform integrates Red Hat's automation suite consisting of Red Hat Ansible Tower, Red Hat Ansible Engine, Automation Hub and use-case specific capabilities for Microsoft Windows, network, security, and more, along with Software-as-a-Service -based capabilities and features for organization-wide effectiveness. This update fixes various bugs and adds enhancements. Documentation for these changes is available from the Release Notes document linked to in the References section. Issues addressed include code execution, denial of service, and traversal vulnerabilities.

tags | advisory, denial of service, vulnerability, code execution
systems | linux, redhat, windows
advisories | CVE-2020-15366, CVE-2020-7789, CVE-2021-20270, CVE-2021-3281
SHA-256 | 31eef7ec3b851813c547d30e87efc846893d2cc98b58d36edf0cac10328e2710
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