usn-4897-2
Vulnerability from osv_ubuntu
Published
2023-08-14 10:38
Modified
2026-06-29 10:52
Summary
pygments vulnerabilities
Details

USN-4897-1 fixed several vulnerabilities in Pygments. This update provides the corresponding update for Ubuntu 14.04 LTS.

Original advisory details:

Ben Caller discovered that Pygments incorrectly handled parsing certain files. If a user or automated system were tricked into parsing a specially crafted file, a remote attacker could cause Pygments to hang or consume resources, resulting in a denial of service. (CVE-2021-27291)

It was discovered that Pygments incorrectly handled parsing certain files. An attacker could possibly use this issue to cause a denial of service. (CVE-2021-20270)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-20270",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-27291",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:14.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "python-pygments",
            "binary_version": "1.6+dfsg-1ubuntu1.1+esm1"
          },
          {
            "binary_name": "python3-pygments",
            "binary_version": "1.6+dfsg-1ubuntu1.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "pygments",
        "purl": "pkg:deb/ubuntu/pygments@1.6+dfsg-1ubuntu1.1+esm1?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6+dfsg-1ubuntu1.1+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.6+dfsg-1",
        "1.6+dfsg-1build1",
        "1.6+dfsg-1ubuntu1",
        "1.6+dfsg-1ubuntu1.1"
      ]
    }
  ],
  "aliases": [],
  "details": "USN-4897-1 fixed several vulnerabilities in Pygments. This update provides\nthe corresponding update for Ubuntu 14.04 LTS.\n\nOriginal advisory details:\n\n Ben Caller discovered that Pygments incorrectly handled parsing certain\n files. If a user or automated system were tricked into parsing a specially\n crafted file, a remote attacker could cause Pygments to hang or consume\n resources, resulting in a denial of service. (CVE-2021-27291)\n\n It was discovered that Pygments incorrectly handled parsing certain\n files. An attacker could possibly use this issue to cause a denial of\n service. (CVE-2021-20270)\n",
  "id": "USN-4897-2",
  "modified": "2026-06-29T10:52:49Z",
  "published": "2023-08-14T10:38:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4897-2"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-20270"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-27291"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "pygments vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2021-20270",
    "UBUNTU-CVE-2021-27291"
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.