cvelistv5 - cve-2024-22190

Source	URL	Tags
security-advisories@github.com	https://github.com/gitpython-developers/GitPython/commit/ef3192cc414f2fd9978908454f6fd95243784c7f	Patch
security-advisories@github.com	https://github.com/gitpython-developers/GitPython/pull/1792	Patch, Vendor Advisory
security-advisories@github.com	https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-2mqj-m65w-jghx	Vendor Advisory

Vendor	Product
gitpython-developers	GitPython

ghsa-2mqj-m65w-jghx

Vulnerability from github

Published

2024-01-10 15:46

Modified

2024-01-19 16:24

Severity

7.8 (High) - CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Summary

Untrusted search path under some conditions on Windows allows arbitrary code execution

Details

Summary

This issue exists because of an incomplete fix for CVE-2023-40590. On Windows, GitPython uses an untrusted search path if it uses a shell to run git, as well as when it runs bash.exe to interpret hooks. If either of those features are used on Windows, a malicious git.exe or bash.exe may be run from an untrusted repository.

Details

Although GitPython often avoids executing programs found in an untrusted search path since 3.1.33, two situations remain where this still occurs. Either can allow arbitrary code execution under some circumstances.

When a shell is used

GitPython can be told to run git commands through a shell rather than as direct subprocesses, by passing shell=True to any method that accepts it, or by both setting Git.USE_SHELL = True and not passing shell=False. Then the Windows cmd.exe shell process performs the path search, and GitPython does not prevent that shell from finding and running git in the current directory.

When GitPython runs git directly rather than through a shell, the GitPython process performs the path search, and currently omits the current directory by setting NoDefaultCurrentDirectoryInExePath in its own environment during the Popen call. Although the cmd.exe shell will honor this environment variable when present, GitPython does not currently pass it into the shell subprocess's environment.

Furthermore, because GitPython sets the subprocess CWD to the root of a repository's working tree, using a shell will run a malicious git.exe in an untrusted repository even if GitPython itself is run from a trusted location.

This also applies if Git.execute is called directly with shell=True (or after Git.USE_SHELL = True) to run any command.

When hook scripts are run

On Windows, GitPython uses bash.exe to run hooks that appear to be scripts. However, unlike when running git, no steps are taken to avoid finding and running bash.exe in the current directory.

This allows the author of an untrusted fork or branch to cause a malicious bash.exe to be run in some otherwise safe workflows. An example of such a scenario is if the user installs a trusted hook while on a trusted branch, then switches to an untrusted feature branch (possibly from a fork) to review proposed changes. If the untrusted feature branch contains a malicious bash.exe and the user's current working directory is the working tree, and the user performs an action that runs the hook, then although the hook itself is uncorrupted, it runs with the malicious bash.exe.

Note that, while bash.exe is a shell, this is a separate scenario from when git is run using the unrelated Windows cmd.exe shell.

PoC

On Windows, create a git.exe file in a repository. Then create a Repo object, and call any method through it (directly or indirectly) that supports the shell keyword argument with shell=True:

powershell mkdir testrepo git init testrepo cp ... testrepo git.exe # Replace "..." with any executable of choice. python -c "import git; print(git.Repo('testrepo').git.version(shell=True))"

The git.exe executable in the repository directory will be run.

Or use no Repo object, but do it from the location with the git.exe:

powershell cd testrepo python -c "import git; print(git.Git().version(shell=True))"

The git.exe executable in the current directory will be run.

For the scenario with hooks, install a hook in a repository, create a bash.exe file in the current directory, and perform an operation that causes GitPython to attempt to run the hook:

powershell mkdir testrepo cd testrepo git init mv .git/hooks/pre-commit.sample .git/hooks/pre-commit cp ... bash.exe # Replace "..." with any executable of choice. echo "Some text" >file.txt git add file.txt python -c "import git; git.Repo().index.commit('Some message')"

The bash.exe executable in the current directory will be run.

Impact

The greatest impact is probably in applications that set Git.USE_SHELL = True for historical reasons. (Undesired console windows had, in the past, been created in some kinds of applications, when it was not used.) Such an application may be vulnerable to arbitrary code execution from a malicious repository, even with no other exacerbating conditions. This is to say that, if a shell is used to run git, the full effect of CVE-2023-40590 is still present. Furthermore, as noted above, running the application itself from a trusted directory is not a sufficient mitigation.

An application that does not direct GitPython to use a shell to run git subprocesses thus avoids most of the risk. However, there is no such straightforward way to prevent GitPython from running bash.exe to interpret hooks. So while the conditions needed for that to be exploited are more involved, it may be harder to mitigate decisively prior to patching.

Possible solutions

A straightforward approach would be to address each bug directly:

When a shell is used, pass NoDefaultCurrentDirectoryInExePath into the subprocess environment, because in that scenario the subprocess is the cmd.exe shell that itself performs the path search.
Set NoDefaultCurrentDirectoryInExePath in the GitPython process environment during the Popen call made to run hooks with a bash.exe subprocess.

These need only be done on Windows.

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "GitPython"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.41"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-22190"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-426"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-01-10T15:46:00Z",
    "nvd_published_at": "2024-01-11T02:15:48Z",
    "severity": "HIGH"
  },
  "details": "### Summary\n\nThis issue exists because of an incomplete fix for CVE-2023-40590. On Windows, GitPython uses an untrusted search path if it uses a shell to run `git`, as well as when it runs `bash.exe` to interpret hooks. If either of those features are used on Windows, a malicious `git.exe` or `bash.exe` may be run from an untrusted repository.\n\n### Details\n\nAlthough GitPython often avoids executing programs found in an untrusted search path since 3.1.33, two situations remain where this still occurs. Either can allow arbitrary code execution under some circumstances.\n\n#### When a shell is used\n\nGitPython can be told to run `git` commands through a shell rather than as direct subprocesses, by passing `shell=True` to any method that accepts it, or by both setting `Git.USE_SHELL = True` and not passing `shell=False`. Then the Windows `cmd.exe` shell process performs the path search, and GitPython does not prevent that shell from finding and running `git` in the current directory.\n\nWhen GitPython runs `git` directly rather than through a shell, the GitPython process performs the path search, and currently omits the current directory by setting `NoDefaultCurrentDirectoryInExePath` in its own environment during the `Popen` call. Although the `cmd.exe` shell will honor this environment variable when present, GitPython does not currently pass it into the shell subprocess\u0027s environment.\n\nFurthermore, because GitPython sets the subprocess CWD to the root of a repository\u0027s working tree, using a shell will run a malicious `git.exe` in an untrusted repository even if GitPython itself is run from a trusted location.\n\nThis also applies if `Git.execute` is called directly with `shell=True` (or after `Git.USE_SHELL = True`) to run any command.\n\n#### When hook scripts are run\n\nOn Windows, GitPython uses `bash.exe` to run hooks that appear to be scripts. However, unlike when running `git`, no steps are taken to avoid finding and running `bash.exe` in the current directory.\n\nThis allows the author of an untrusted fork or branch to cause a malicious `bash.exe` to be run in some otherwise safe workflows. An example of such a scenario is if the user installs a trusted hook while on a trusted branch, then switches to an untrusted feature branch (possibly from a fork) to review proposed changes. If the untrusted feature branch contains a malicious `bash.exe` and the user\u0027s current working directory is the working tree, and the user performs an action that runs the hook, then although the hook itself is uncorrupted, it runs with the malicious `bash.exe`.\n\nNote that, while `bash.exe` is a shell, this is a separate scenario from when `git` is run using the unrelated Windows `cmd.exe` shell.\n\n### PoC\n\nOn Windows, create a `git.exe` file in a repository. Then create a `Repo` object, and call any method through it (directly or indirectly) that supports the `shell` keyword argument with `shell=True`:\n\n```powershell\nmkdir testrepo\ngit init testrepo\ncp ... testrepo git.exe # Replace \"...\" with any executable of choice.\npython -c \"import git; print(git.Repo(\u0027testrepo\u0027).git.version(shell=True))\"\n```\n\nThe `git.exe` executable in the repository directory will be run.\n\nOr use no `Repo` object, but do it from the location with the `git.exe`:\n\n```powershell\ncd testrepo\npython -c \"import git; print(git.Git().version(shell=True))\"\n```\n\nThe `git.exe` executable in the current directory will be run.\n\nFor the scenario with hooks, install a hook in a repository, create a `bash.exe` file in the current directory, and perform an operation that causes GitPython to attempt to run the hook:\n\n```powershell\nmkdir testrepo\ncd testrepo\ngit init\nmv .git/hooks/pre-commit.sample .git/hooks/pre-commit\ncp ... bash.exe # Replace \"...\" with any executable of choice.\necho \"Some text\" \u003efile.txt\ngit add file.txt\npython -c \"import git; git.Repo().index.commit(\u0027Some message\u0027)\"\n```\n\nThe `bash.exe` executable in the current directory will be run.\n\n### Impact\n\nThe greatest impact is probably in applications that set `Git.USE_SHELL = True` for historical reasons. (Undesired console windows had, in the past, been created in some kinds of applications, when it was not used.) Such an application may be vulnerable to arbitrary code execution from a malicious repository, even with no other exacerbating conditions. This is to say that, if a shell is used to run `git`, the full effect of CVE-2023-40590 is still present. Furthermore, as noted above, running the application itself from a trusted directory is not a sufficient mitigation.\n\nAn application that does not direct GitPython to use a shell to run `git` subprocesses thus avoids most of the risk. However, there is no such straightforward way to prevent GitPython from running `bash.exe` to interpret hooks. So while the conditions needed for that to be exploited are more involved, it may be harder to mitigate decisively prior to patching.\n\n### Possible solutions\n\nA straightforward approach would be to address each bug directly:\n\n- When a shell is used, pass `NoDefaultCurrentDirectoryInExePath` into the subprocess environment, because in that scenario the subprocess is the `cmd.exe` shell that itself performs the path search.\n- Set `NoDefaultCurrentDirectoryInExePath` in the GitPython process environment during the `Popen` call made to run hooks with a `bash.exe` subprocess.\n\nThese need only be done on Windows.",
  "id": "GHSA-2mqj-m65w-jghx",
  "modified": "2024-01-19T16:24:47Z",
  "published": "2024-01-10T15:46:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-2mqj-m65w-jghx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-22190"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gitpython-developers/GitPython/pull/1792"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gitpython-developers/GitPython/commit/ef3192cc414f2fd9978908454f6fd95243784c7f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/gitpython-developers/GitPython"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/gitpython/PYSEC-2024-4.yaml"
    }
  ],
  "schema_version": "1.4.0",
  "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": "Untrusted search path under some conditions on Windows allows arbitrary code execution"
}

gsd-2024-22190

Vulnerability from gsd

Modified

2024-01-08 06:02

Details

GitPython is a python library used to interact with Git repositories. There is an incomplete fix for CVE-2023-40590. On Windows, GitPython uses an untrusted search path if it uses a shell to run `git`, as well as when it runs `bash.exe` to interpret hooks. If either of those features are used on Windows, a malicious `git.exe` or `bash.exe` may be run from an untrusted repository. This issue has been patched in version 3.1.41.

Aliases

CVE-2024-22190

JSON

To clipboard

{
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2024-22190"
      ],
      "details": "GitPython is a python library used to interact with Git repositories. There is an incomplete fix for CVE-2023-40590. On Windows, GitPython uses an untrusted search path if it uses a shell to run `git`, as well as when it runs `bash.exe` to interpret hooks. If either of those features are used on Windows, a malicious `git.exe` or `bash.exe` may be run from an untrusted repository. This issue has been patched in version 3.1.41.",
      "id": "GSD-2024-22190",
      "modified": "2024-01-08T06:02:13.781744Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2024-22190",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "GitPython",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "=",
                          "version_value": "\u003c 3.1.41"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "gitpython-developers"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
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            "lang": "eng",
            "value": "GitPython is a python library used to interact with Git repositories. There is an incomplete fix for CVE-2023-40590. On Windows, GitPython uses an untrusted search path if it uses a shell to run `git`, as well as when it runs `bash.exe` to interpret hooks. If either of those features are used on Windows, a malicious `git.exe` or `bash.exe` may be run from an untrusted repository. This issue has been patched in version 3.1.41."
          }
        ]
      },
      "impact": {
        "cvss": [
          {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
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      },
      "problemtype": {
        "problemtype_data": [
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            "description": [
              {
                "cweId": "CWE-426",
                "lang": "eng",
                "value": "CWE-426: Untrusted Search Path"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-2mqj-m65w-jghx",
            "refsource": "MISC",
            "url": "https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-2mqj-m65w-jghx"
          },
          {
            "name": "https://github.com/gitpython-developers/GitPython/pull/1792",
            "refsource": "MISC",
            "url": "https://github.com/gitpython-developers/GitPython/pull/1792"
          },
          {
            "name": "https://github.com/gitpython-developers/GitPython/commit/ef3192cc414f2fd9978908454f6fd95243784c7f",
            "refsource": "MISC",
            "url": "https://github.com/gitpython-developers/GitPython/commit/ef3192cc414f2fd9978908454f6fd95243784c7f"
          }
        ]
      },
      "source": {
        "advisory": "GHSA-2mqj-m65w-jghx",
        "discovery": "UNKNOWN"
      }
    },
    "nvd.nist.gov": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:gitpython_project:gitpython:*:*:*:*:*:python:*:*",
                    "matchCriteriaId": "3EFC0264-B10D-4EAA-B78B-FDDEE26A4B8A",
                    "versionEndExcluding": "3.1.41",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "descriptions": [
          {
            "lang": "en",
            "value": "GitPython is a python library used to interact with Git repositories. There is an incomplete fix for CVE-2023-40590. On Windows, GitPython uses an untrusted search path if it uses a shell to run `git`, as well as when it runs `bash.exe` to interpret hooks. If either of those features are used on Windows, a malicious `git.exe` or `bash.exe` may be run from an untrusted repository. This issue has been patched in version 3.1.41."
          },
          {
            "lang": "es",
            "value": "GitPython es una librer\u00eda de Python que se utiliza para interactuar con los repositorios de Git. Existe una soluci\u00f3n incompleta para CVE-2023-40590. En Windows, GitPython usa una ruta de b\u00fasqueda que no es de confianza si usa un shell para ejecutar `git`, as\u00ed como cuando ejecuta `bash.exe` para interpretar ganchos. Si cualquiera de esas funciones se utiliza en Windows, se puede ejecutar un `git.exe` o `bash.exe` malicioso desde un repositorio que no es de confianza. Este problema se solucion\u00f3 en la versi\u00f3n 3.1.41."
          }
        ],
        "id": "CVE-2024-22190",
        "lastModified": "2024-01-18T13:48:07.553",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            },
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "security-advisories@github.com",
              "type": "Secondary"
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        "published": "2024-01-11T02:15:48.250",
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            "source": "security-advisories@github.com",
            "tags": [
              "Patch"
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          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://github.com/gitpython-developers/GitPython/pull/1792"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
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          }
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        "vulnStatus": "Analyzed",
        "weaknesses": [
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            "description": [
              {
                "lang": "en",
                "value": "CWE-426"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
        ]
      }
    }
  }
}

pysec-2024-4

Vulnerability from pysec

Published

2024-01-11 02:15

Modified

2024-01-18 16:22

Severity

7.8 (High) - CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

GitPython is a python library used to interact with Git repositories. There is an incomplete fix for CVE-2023-40590. On Windows, GitPython uses an untrusted search path if it uses a shell to run git, as well as when it runs bash.exe to interpret hooks. If either of those features are used on Windows, a malicious git.exe or bash.exe may be run from an untrusted repository. This issue has been patched in version 3.1.41.

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "gitpython",
        "purl": "pkg:pypi/gitpython"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "ef3192cc414f2fd9978908454f6fd95243784c7f"
            }
          ],
          "repo": "https://github.com/gitpython-developers/GitPython",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.41"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.1.7",
        "0.2.0-beta1",
        "0.3.0-beta1",
        "0.3.0-beta2",
        "0.3.1-beta2",
        "0.3.2",
        "0.3.2.1",
        "0.3.2.RC1",
        "0.3.3",
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        "0.3.5",
        "0.3.6",
        "0.3.7",
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        "2.0.6",
        "2.0.7",
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        "2.0.9.dev0",
        "2.0.9.dev1",
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        "2.1.1",
        "2.1.10",
        "2.1.11",
        "2.1.12",
        "2.1.13",
        "2.1.14",
        "2.1.15",
        "2.1.2",
        "2.1.3",
        "2.1.4",
        "2.1.5",
        "2.1.6",
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        "2.1.8",
        "2.1.9",
        "3.0.0",
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        "3.1.18",
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        "3.1.22",
        "3.1.23",
        "3.1.24",
        "3.1.25",
        "3.1.26",
        "3.1.27",
        "3.1.28",
        "3.1.29",
        "3.1.3",
        "3.1.30",
        "3.1.31",
        "3.1.32",
        "3.1.33",
        "3.1.34",
        "3.1.35",
        "3.1.36",
        "3.1.37",
        "3.1.38",
        "3.1.4",
        "3.1.40",
        "3.1.5",
        "3.1.6",
        "3.1.7",
        "3.1.8",
        "3.1.9"
      ]
    }
  ],
  "aliases": [
    "CVE-2024-22190",
    "GHSA-2mqj-m65w-jghx"
  ],
  "details": "GitPython is a python library used to interact with Git repositories. There is an incomplete fix for CVE-2023-40590. On Windows, GitPython uses an untrusted search path if it uses a shell to run `git`, as well as when it runs `bash.exe` to interpret hooks. If either of those features are used on Windows, a malicious `git.exe` or `bash.exe` may be run from an untrusted repository. This issue has been patched in version 3.1.41.",
  "id": "PYSEC-2024-4",
  "modified": "2024-01-18T16:22:52.190857+00:00",
  "published": "2024-01-11T02:15:00+00:00",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-2mqj-m65w-jghx"
    },
    {
      "type": "FIX",
      "url": "https://github.com/gitpython-developers/GitPython/pull/1792"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/gitpython-developers/GitPython/pull/1792"
    },
    {
      "type": "FIX",
      "url": "https://github.com/gitpython-developers/GitPython/commit/ef3192cc414f2fd9978908454f6fd95243784c7f"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

Action not permitted

cve-2024-22190

Vulnerability from cvelistv5

ghsa-2mqj-m65w-jghx

Vulnerability from github

Summary

Details

When a shell is used

When hook scripts are run

PoC

Impact

Possible solutions

gsd-2024-22190

Vulnerability from gsd

pysec-2024-4

Vulnerability from pysec

Tags