Vulnerability-Lookup

alsa-2021:4150

Vulnerability from osv_almalinux

Published

2021-11-09 08:24

Modified

2021-11-09 12:44

Summary

Moderate: python36:3.6 security and bug fix update

Details

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.

Security Fix(es):

python-pygments: Infinite loop in SML lexer may lead to DoS (CVE-2021-20270)
python-pygments: ReDoS in multiple lexers (CVE-2021-27291)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

JSON

To clipboard

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  ],
  "details": "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.\n\nSecurity Fix(es):\n\n* python-pygments: Infinite loop in SML lexer may lead to DoS (CVE-2021-20270)\n\n* python-pygments: ReDoS in multiple lexers (CVE-2021-27291)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.",
  "id": "ALSA-2021:4150",
  "modified": "2021-11-09T12:44:54Z",
  "published": "2021-11-09T08:24:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/8/ALSA-2021-4150.html"
    },
    {
      "type": "REPORT",
      "url": "https://vulners.com/cve/CVE-2021-20270"
    },
    {
      "type": "REPORT",
      "url": "https://vulners.com/cve/CVE-2021-27291"
    }
  ],
  "related": [
    "CVE-2021-20270",
    "CVE-2021-27291"
  ],
  "summary": "Moderate: python36:3.6 security and bug fix update"
}

CVE-2021-27291 (GCVE-0-2021-27291)

Vulnerability from cvelistv5 – Published: 2021-03-17 12:31 – Updated: 2024-08-03 20:48

Summary

In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have exponential or cubic worst-case complexity and are vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service.

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

	https://gist.github.com/b-c-ds/b1a2cc0c68a35c5718…	x_refsource_MISC
	https://github.com/pygments/pygments/commit/2e7e8…	x_refsource_MISC
	https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST
	https://www.debian.org/security/2021/dsa-4878	vendor-advisoryx_refsource_DEBIAN
	https://www.debian.org/security/2021/dsa-4889	vendor-advisoryx_refsource_DEBIAN
	https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
	https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST

Show details on NVD website

JSON

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CVE-2021-20270 (GCVE-0-2021-20270)

Vulnerability from cvelistv5 – Published: 2021-03-23 16:40 – Updated: 2024-08-03 17:37

Summary

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.

Severity ?

No CVSS data available.

CWE

CWE-835

Assigner

redhat

References

URL

	Vendor	Product	Version
	n/a	python-pygments	Affected: python-pygments 2.7.4

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

alsa-2021:4150

Vulnerability from osv_almalinux

CVE-2021-27291 (GCVE-0-2021-27291)

CVE-2021-20270 (GCVE-0-2021-20270)

Tags

Sightings

Nomenclature