Vulnerability-Lookup

OESA-2022-1549 (CVE-2021-36770)

Vulnerability from osv_openeuler – Published: 2022-03-07 11:04 – Updated: 2026-08-06 11:04 – Source website

Summary

perl-Encode security update

Details

Character encodings in Perl.

Security Fix(es):

Encode.pm, as distributed in Perl through 5.34.0, allows local users to gain privileges via a Trojan horse Encode::ConfigLocal library (in the current working directory) that preempts dynamic module loading. Exploitation requires an unusual configuration, and certain 2021 versions of Encode.pm (3.05 through 3.11). This issue occurs because the || operator evaluates @INC in a scalar context, and thus @INC has only an integer value.(CVE-2021-36770)

Severity

7.8 (High)


                    
                      CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-36770	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "perl-Encode-3.06-2.oe1.aarch64.rpm",
          "perl-Encode-devel-3.06-2.oe1.aarch64.rpm",
          "perl-Encode-debugsource-3.06-2.oe1.aarch64.rpm",
          "perl-Encode-debuginfo-3.06-2.oe1.aarch64.rpm"
        ],
        "noarch": [
          "perl-Encode-help-3.06-2.oe1.noarch.rpm"
        ],
        "src": [
          "perl-Encode-3.06-2.oe1.src.rpm"
        ],
        "x86_64": [
          "perl-Encode-3.06-2.oe1.x86_64.rpm",
          "perl-Encode-debugsource-3.06-2.oe1.x86_64.rpm",
          "perl-Encode-devel-3.06-2.oe1.x86_64.rpm",
          "perl-Encode-debuginfo-3.06-2.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "perl-Encode",
        "purl": "pkg:rpm/openEuler/perl-Encode\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.06-2.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "perl-Encode-devel-3.06-2.oe1.aarch64.rpm",
          "perl-Encode-debuginfo-3.06-2.oe1.aarch64.rpm",
          "perl-Encode-debugsource-3.06-2.oe1.aarch64.rpm",
          "perl-Encode-3.06-2.oe1.aarch64.rpm"
        ],
        "noarch": [
          "perl-Encode-help-3.06-2.oe1.noarch.rpm"
        ],
        "src": [
          "perl-Encode-3.06-2.oe1.src.rpm"
        ],
        "x86_64": [
          "perl-Encode-debuginfo-3.06-2.oe1.x86_64.rpm",
          "perl-Encode-devel-3.06-2.oe1.x86_64.rpm",
          "perl-Encode-debugsource-3.06-2.oe1.x86_64.rpm",
          "perl-Encode-3.06-2.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP2",
        "name": "perl-Encode",
        "purl": "pkg:rpm/openEuler/perl-Encode\u0026distro=openEuler-20.03-LTS-SP2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.06-2.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "perl-Encode-3.06-2.oe1.aarch64.rpm",
          "perl-Encode-devel-3.06-2.oe1.aarch64.rpm",
          "perl-Encode-debuginfo-3.06-2.oe1.aarch64.rpm",
          "perl-Encode-debugsource-3.06-2.oe1.aarch64.rpm"
        ],
        "noarch": [
          "perl-Encode-help-3.06-2.oe1.noarch.rpm"
        ],
        "src": [
          "perl-Encode-3.06-2.oe1.src.rpm"
        ],
        "x86_64": [
          "perl-Encode-debugsource-3.06-2.oe1.x86_64.rpm",
          "perl-Encode-devel-3.06-2.oe1.x86_64.rpm",
          "perl-Encode-3.06-2.oe1.x86_64.rpm",
          "perl-Encode-debuginfo-3.06-2.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP3",
        "name": "perl-Encode",
        "purl": "pkg:rpm/openEuler/perl-Encode\u0026distro=openEuler-20.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.06-2.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "Character encodings in Perl.\r\n\r\nSecurity Fix(es):\r\n\r\nEncode.pm, as distributed in Perl through 5.34.0, allows local users to gain privileges via a Trojan horse Encode::ConfigLocal library (in the current working directory) that preempts dynamic module loading. Exploitation requires an unusual configuration, and certain 2021 versions of Encode.pm (3.05 through 3.11). This issue occurs because the || operator evaluates @INC in a scalar context, and thus @INC has only an integer value.(CVE-2021-36770)",
  "id": "OESA-2022-1549",
  "modified": "2026-08-06T11:04:49Z",
  "published": "2022-03-07T11:04:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1549"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-36770"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "perl-Encode security update",
  "upstream": [
    "CVE-2021-36770"
  ]
}

CVE-2021-36770 (GCVE-0-2021-36770)

Vulnerability from cvelistv5 – Published: 2021-08-11 22:49 – Updated: 2025-11-03 21:45

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

9 references

URL	Tags
https://metacpan.org/dist/Encode/changes	x_refsource_CONFIRM
https://security-tracker.debian.org/tracker/CVE-2…	x_refsource_MISC
https://github.com/dankogai/p5-encode/commit/527e…	x_refsource_CONFIRM
https://github.com/Perl/perl5/commit/c1a937fef07c…	x_refsource_CONFIRM
https://news.cpanel.com/unscheduled-tsr-10-august-2021/	x_refsource_CONFIRM
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://security.netapp.com/advisory/ntap-2021090…	x_refsource_CONFIRM
https://security.netapp.com/advisory/ntap-2024110…

Show details on NVD website

JSON

To clipboard

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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

OESA-2022-1549 (CVE-2021-36770)

CVE-2021-36770 (GCVE-0-2021-36770)

Tags

Sightings

Nomenclature

Related by attack behaviour