CVE-2023-4759 (GCVE-0-2023-4759)

Vulnerability from cvelistv5 – Published: 2023-09-12 09:12 – Updated: 2024-08-02 07:37
VLAI
Title
Improper handling of case insensitive filesystems in Eclipse JGit allows arbitrary file write
Summary
Arbitrary File Overwrite in Eclipse JGit <= 6.6.0 In Eclipse JGit, all versions <= 6.6.0.202305301015-r, a symbolic link present in a specially crafted git repository can be used to write a file to locations outside the working tree when this repository is cloned with JGit to a case-insensitive filesystem, or when a checkout from a clone of such a repository is performed on a case-insensitive filesystem. This can happen on checkout (DirCacheCheckout), merge (ResolveMerger via its WorkingTreeUpdater), pull (PullCommand using merge), and when applying a patch (PatchApplier). This can be exploited for remote code execution (RCE), for instance if the file written outside the working tree is a git filter that gets executed on a subsequent git command. The issue occurs only on case-insensitive filesystems, like the default filesystems on Windows and macOS. The user performing the clone or checkout must have the rights to create symbolic links for the problem to occur, and symbolic links must be enabled in the git configuration. Setting git configuration option core.symlinks = false before checking out avoids the problem. The issue was fixed in Eclipse JGit version 6.6.1.202309021850-r and 6.7.0.202309050840-r, available via Maven Central https://repo1.maven.org/maven2/org/eclipse/jgit/  and repo.eclipse.org https://repo.eclipse.org/content/repositories/jgit-releases/ . A backport is available in 5.13.3 starting from 5.13.3.202401111512-r. The JGit maintainers would like to thank RyotaK for finding and reporting this issue.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • CWE-59 - Improper Link Resolution Before File Access ('Link Following')
  • CWE-178 - Improper Handling of Case Sensitivity
Assigner
References
Impacted products
Vendor Product Version
Eclipse Foundation Eclipse JGit Affected: 0.0.0 , ≤ 6.6.0.202305301015-r (semver)
Unaffected: 5.13.3.202401111512-r
Create a notification for this product.
Date Public
2023-09-12 10:00
Credits
RyotaK
Show details on NVD website
To clipboard 

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This can be exploited for remote code execution (RCE), for instance if the file written outside the working tree is a git filter that gets executed on a subsequent git command.\u003c/p\u003e\u003cp\u003eThe issue occurs only on case-\u003cstrong\u003ein\u003c/strong\u003esensitive filesystems, like the default filesystems on Windows and macOS. The user performing the clone or checkout must have the rights to create symbolic links for the problem to occur, and symbolic links must be enabled in the git configuration.\u003c/p\u003e\u003cp\u003eSetting git configuration option \u003ccode\u003ecore.symlinks = false\u003c/code\u003e\u0026nbsp;before checking out avoids the problem.\u003c/p\u003e\u003cp\u003eThe issue was fixed in Eclipse JGit version 6.6.1.202309021850-r and 6.7.0.202309050840-r, available via \u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://repo1.maven.org/maven2/org/eclipse/jgit/\\\"\u003eMaven Central\u003c/a\u003e\u0026nbsp;and \u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://repo.eclipse.org/content/repositories/jgit-releases/\\\"\u003erepo.eclipse.org\u003c/a\u003e. A backport is available in 5.13.3 starting from  5.13.3.202401111512-r.\u003cbr\u003e\u003c/p\u003e\u003cp\u003eThe JGit maintainers would like to thank RyotaK for finding and reporting this issue.\u003cbr\u003e\u003c/p\u003e\u003cbr\u003e\"}], \"value\": \"Arbitrary File Overwrite in Eclipse JGit \u003c= 6.6.0\\n\\nIn Eclipse JGit, all versions \u003c= 6.6.0.202305301015-r, a symbolic link present in a specially crafted git repository can be used to write a file to locations outside the working tree when this repository is cloned with JGit to a case-insensitive filesystem, or when a checkout from a clone of such a repository is performed on a case-insensitive filesystem.\\n\\nThis can happen on checkout (DirCacheCheckout), merge (ResolveMerger\\u00a0via its WorkingTreeUpdater), pull (PullCommand\\u00a0using merge), and when applying a patch (PatchApplier). This can be exploited for remote code execution (RCE), for instance if the file written outside the working tree is a git filter that gets executed on a subsequent git command.\\n\\nThe issue occurs only on case-insensitive filesystems, like the default filesystems on Windows and macOS. The user performing the clone or checkout must have the rights to create symbolic links for the problem to occur, and symbolic links must be enabled in the git configuration.\\n\\nSetting git configuration option core.symlinks = false\\u00a0before checking out avoids the problem.\\n\\nThe issue was fixed in Eclipse JGit version 6.6.1.202309021850-r and 6.7.0.202309050840-r, available via  Maven Central https://repo1.maven.org/maven2/org/eclipse/jgit/ \\u00a0and  repo.eclipse.org https://repo.eclipse.org/content/repositories/jgit-releases/ . A backport is available in 5.13.3 starting from  5.13.3.202401111512-r.\\n\\n\\nThe JGit maintainers would like to thank RyotaK for finding and reporting this issue.\\n\\n\\n\\n\"}], \"impacts\": [{\"capecId\": \"CAPEC-132\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-132 Symlink Attack\"}]}], \"metrics\": [{\"cvssV3_1\": {\"attackComplexity\": \"LOW\", \"attackVector\": \"NETWORK\", \"availabilityImpact\": \"HIGH\", \"baseScore\": 8.8, \"baseSeverity\": \"HIGH\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"scope\": \"UNCHANGED\", \"userInteraction\": \"REQUIRED\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H\", \"version\": \"3.1\"}, \"format\": \"CVSS\", \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-59\", \"description\": \"CWE-59 Improper Link Resolution Before File Access (\u0027Link Following\u0027)\", \"lang\": \"en\", \"type\": \"CWE\"}]}, {\"descriptions\": [{\"cweId\": \"CWE-178\", \"description\": \"CWE-178 Improper Handling of Case Sensitivity\", \"lang\": \"en\", \"type\": \"CWE\"}]}], \"providerMetadata\": {\"orgId\": \"e51fbebd-6053-4e49-959f-1b94eeb69a2c\", \"shortName\": \"eclipse\", \"dateUpdated\": \"2024-01-12T15:21:24.101Z\"}, \"references\": [{\"url\": \"https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/11\"}, {\"url\": \"https://projects.eclipse.org/projects/technology.jgit/releases/6.6.1\"}, {\"url\": \"https://git.eclipse.org/c/jgit/jgit.git/commit/?id=9072103f3b3cf64dd12ad2949836ab98f62dabf1\"}], \"source\": {\"discovery\": \"EXTERNAL\"}, \"title\": \"Improper handling of case insensitive filesystems in Eclipse JGit allows arbitrary file write\", \"workarounds\": [{\"lang\": \"en\", \"supportingMedia\": [{\"base64\": false, \"type\": \"text/html\", \"value\": \"\u003cp\u003eSetting git configuration option \u003ccode\u003ecore.symlinks = false\u003c/code\u003e\u0026nbsp;before checking out avoids the problem.\u003c/p\u003e\"}], \"value\": \"Setting git configuration option core.symlinks = false\\u00a0before checking out avoids the problem.\\n\\n\"}], \"x_generator\": {\"engine\": \"Vulnogram 0.1.0-dev\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-4759\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-07-19T03:55:38.083883Z\"}}}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:eclipse:jgit:*:*:*:*:*:*:*:*\"], \"vendor\": \"eclipse\", \"product\": \"jgit\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.0.202305301015-r\"}], \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:2.3:a:eclipse:jgit:5.13.3.202401111512-r:*:*:*:*:*:*:*\"], \"vendor\": \"eclipse\", \"product\": \"jgit\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"5.13.3.202401111512-r\"}], \"defaultStatus\": \"unaffected\"}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-07-19T13:50:05.173Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-4759\", \"assignerOrgId\": \"e51fbebd-6053-4e49-959f-1b94eeb69a2c\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"eclipse\", \"dateReserved\": \"2023-09-04T16:06:00.689Z\", \"datePublished\": \"2023-09-12T09:12:10.254Z\", \"dateUpdated\": \"2024-07-19T13:51:38.023Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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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.