Git vulnerable to local clone-based data exfiltration with non-local transports

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Summary

CVECVE-2023-22490
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-02-14 20:15:16 UTC
Updated2026-10-08 22:17:22 UTC
DescriptionGit is a revision control system. Using a specially-crafted repository, Git prior to versions 2.39.2, 2.38.4, 2.37.6, 2.36.5, 2.35.7, 2.34.7, 2.33.7, 2.32.6, 2.31.7, and 2.30.8 can be tricked into using its local clone optimization even when using a non-local transport. Though Git will abort local clones whose source `$GIT_DIR/objects` directory contains symbolic links, the `objects` directory itself may still be a symbolic link. These two may be combined to include arbitrary files based on known paths on the victim's filesystem within the malicious repository's working copy, allowing for data exfiltration in a similar manner as CVE-2022-39253. A fix has been prepared and will appear in v2.39.2 v2.38.4 v2.37.6 v2.36.5 v2.35.7 v2.34.7 v2.33.7 v2.32.6, v2.31.7 and v2.30.8. If upgrading is impractical, two short-term workarounds are available. Avoid cloning repositories from untrusted sources with `--recurse-submodules`. Instead, consider cloning repositories without recursively cloning their submodules, and instead run `git submodule update` at each layer. Before doing so, inspect each new `.gitmodules` file to ensure that it does not contain suspicious module URLs.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

Problem Types: CWE-59 | CWE-59 CWE-59: Improper Link Resolution Before File Access ('Link Following')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
3.1[email protected]Secondary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
3.1CNADECLARED5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Git-scm Git All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Git Git affected >= 2.39.0, < 2.39.2 Not specified
CNA Git Git affected >= 2.38.0, < 2.38.4 Not specified
CNA Git Git affected >= 2.37.0, < 2.37.6 Not specified
CNA Git Git affected >= 2.36.0, < 2.36.5 Not specified
CNA Git Git affected >= 2.35.0, < 2.35.7 Not specified
CNA Git Git affected >= 2.34.0, < 2.34.7 Not specified
CNA Git Git affected >= 2.33.0, < 2.33.7 Not specified
CNA Git Git affected >= 2.32.0, < 2.32.6 Not specified
CNA Git Git affected >= 2.31.0, < 2.31.7 Not specified
CNA Git Git affected < 2.30.8 Not specified

References

ReferenceSourceLinkTags
Local clone-based data exfiltration with non-local transports · Advisory · git/git · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Vendor Advisory
Sync with Git 2.39.2 · git/git@c867e4f · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Patch
Local clone optimization dereferences symbolic links by default · Advisory · git/git · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Vendor Advisory
Git: Multiple Vulnerabilities (GLSA 202312-15) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 160648 Oracle Enterprise Linux Security Update for git (ELSA-2023-3245)
  • 160686 Oracle Enterprise Linux Security Update for git (ELSA-2023-3246)
  • 181607 Debian Security Update for git (DLA 3338-1)
  • 181677 Debian Security Update for git (DSA 5357-1)
  • 182474 Debian Security Update for git (CVE-2023-22490)
  • 199174 Ubuntu Security Notification for Git Vulnerabilities (USN-5871-1)
  • 241549 Red Hat Update for git (RHSA-2023:3246)
  • 241551 Red Hat Update for git (RHSA-2023:3245)
  • 242859 Red Hat Update for git (RHSA-2024:0407)
  • 283708 Fedora Security Update for git (FEDORA-2023-5b372318ff)
  • 283733 Fedora Security Update for git (FEDORA-2023-2b3acb6cfd)
  • 354787 Amazon Linux Security Advisory for git : ALAS2-2023-1984
  • 354808 Amazon Linux Security Advisory for git : ALAS-2023-1700
  • 355065 Amazon Linux Security Advisory for git : AL2012-2023-389
  • 355274 Amazon Linux Security Advisory for git : ALAS2023-2023-113
  • 378539 Alibaba Cloud Linux Security Update for git (ALINUX3-SA-2023:0047)
  • 378542 GitLab Multiple Security Vulnerability (14-Feb-23)
  • 379259 GitLab Multiple Security Vulnerabilities (gitlab- 15.8.2, 15.7.7 and 15.6.8)
  • 502661 Alpine Linux Security Update for git
  • 502662 Alpine Linux Security Update for git
  • 502665 Alpine Linux Security Update for git
  • 502728 Alpine Linux Security Update for git
  • 503107 Alpine Linux Security Update for git
  • 505873 Alpine Linux Security Update for git
  • 673004 EulerOS Security Update for git (EulerOS-SA-2023-1841)
  • 673007 EulerOS Security Update for git (EulerOS-SA-2023-1866)
  • 673014 EulerOS Security Update for git (EulerOS-SA-2023-1951)
  • 673023 EulerOS Security Update for git (EulerOS-SA-2023-1973)
  • 673069 EulerOS Security Update for git (EulerOS-SA-2023-2145)
  • 673139 EulerOS Security Update for git (EulerOS-SA-2023-2289)
  • 673140 EulerOS Security Update for git (EulerOS-SA-2023-2265)
  • 691069 Free Berkeley Software Distribution (FreeBSD) Security Update for git (9548d6ed-b1da-11ed-b0f4-002590f2a714)
  • 710816 Gentoo Linux Git Multiple Vulnerabilities (GLSA 202312-15)
  • 753695 SUSE Enterprise Linux Security Update for git (SUSE-SU-2023:0426-1)
  • 753699 SUSE Enterprise Linux Security Update for git (SUSE-SU-2023:0418-1)
  • 753706 SUSE Enterprise Linux Security Update for git (SUSE-SU-2023:0430-1)
  • 905572 Common Base Linux Mariner (CBL-Mariner) Security Update for git (13607)
  • 906542 Common Base Linux Mariner (CBL-Mariner) Security Update for git (13607-1)
  • 906596 Common Base Linux Mariner (CBL-Mariner) Security Update for git (13607-3)
  • 906796 Common Base Linux Mariner (CBL-Mariner) Security Update for git (13607-5)
  • 91992 Microsoft Visual Studio Security Updates for March 2023
  • 941120 AlmaLinux Security Update for git (ALSA-2023:3246)
  • 941122 AlmaLinux Security Update for git (ALSA-2023:3245)
  • 960936 Rocky Linux Security Update for git (RLSA-2023:3246)

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