GHSA-22q8-ghmq-63vf: Libgit2 sys Denial of Service Vulnerability

HIGH
Share
CVSS 8.6
Published
Advisory Summary

GHSA-22q8-ghmq-63vf is a HIGH (CVSS 8.6) denial of service vulnerability (General Security Weakness) affecting Libgit2 sys libraries in the crates.io ecosystem. The issue involves libgit2-sys affected by memory corruption, denial of service, and arbitrary code execution in libgit2. Remediation is available by upgrading affected packages to version 0.16.2.

GHSA-22q8-ghmq-63vf at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-22q8-ghmq-63vf
Severity HIGH
CVSS v3.1 Base Score 8.6
CWE Classification General Security Weakness
Affected Product Libgit2 sys
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 8.6

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix GHSA-22q8-ghmq-63vf

To remediate this vulnerability, upgrade all affected Libgit2 sys dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

libgit2-sys fixed: 0.16.2 
Upgrade libgit2-sys to 0.16.2
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for libgit2-sys

How to Check if You Are Affected

To determine whether your application is affected by GHSA-22q8-ghmq-63vf, inspect your project dependencies for Libgit2 sys:

inspect dependencies for libgit2-sys

Analyze the terminal output to locate any version of Libgit2 sys in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.16.2), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under General Security Weakness. In Libgit2 sys, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

The [libgit2](https://github.com/libgit2/libgit2/) project fixed three security issues in the 1.7.2 release. These issues are: * The `git_revparse_single` function can potentially enter an infinite loop on a well-crafted input, potentially causing a Denial of Service. This function is exposed in the `git2` crate via the [`Repository::revparse_single`](https://docs.rs/git2/latest/git2/struct.Repository.html#method.revparse_single) method. * The `git_index_add` function may cause heap corruption and possibly lead to arbitrary code execution. This function is exposed in the `git2` crate via the [`Index::add`](https://docs.rs/git2/latest/git2/struct.Index.html#method.add) method. * The smart transport negotiation may experience an out-of-bounds read when a remote server did not advertise capabilities. The `libgit2-sys` crate bundles libgit2, or optionally links to a system libgit2 library. In either case, versions of the libgit2 library less than 1.7.2 are vulnerable. The 0.16.2 release of `libgit2-sys` bundles the fixed version of 1.7.2, and requires a system libgit2 version of at least 1.7.2. It is recommended that all users upgrade.

GHSA-22q8-ghmq-63vf Affected Libgit2 sys Versions

1 component(s)
Fixed Versions:
0.16.2
Product / Package Ecosystem Affected Versions Fixed Version
libgit2-sys
 crates.io
< 0.16.2
0.16.2

References

Libgit2 sys Source Repository REPOSITORY
https://github.com/rust-lang/git2-rs
Libgit2 sys Source Repository REPOSITORY
https://github.com/rust-lang/git2-rs/pull/1017
Security Fix Commit FIX COMMIT
https://github.com/rust-lang/git2-rs/commit/9e57876be78924c1e5f3f268bb599e3981fe58bb
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2024-0013.html

Frequently Asked Questions

What is GHSA-22q8-ghmq-63vf?
GHSA-22q8-ghmq-63vf is a security vulnerability in Libgit2 sys involving libgit2-sys affected by memory corruption, denial of service, and arbitrary code execution in libgit2 under General Security Weakness.
Which Libgit2 sys versions are affected?
Affected versions include releases prior to 0.16.2 across affected packages: libgit2-sys.
What version fixes GHSA-22q8-ghmq-63vf?
Upgrading to 0.16.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is libgit2-sys affected?
Yes, libgit2-sys is affected in releases prior to 0.16.2. Upgrade your dependency to 0.16.2 or later.
What is the CVSS score of GHSA-22q8-ghmq-63vf?
GHSA-22q8-ghmq-63vf has a CVSS v3.1 base score of 8.6 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L.
What CWE is associated with GHSA-22q8-ghmq-63vf?
GHSA-22q8-ghmq-63vf is classified under General Security Weakness.
How can I check crates.io dependencies for GHSA-22q8-ghmq-63vf?
Run the dependency tree command: 'inspect dependencies for libgit2-sys'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-22q8-ghmq-63vf",
  "modified" : "2024-02-12T15:42:14Z",
  "published" : "2024-02-12T15:42:14Z",
  "aliases" : [ ],
  "summary" : "libgit2-sys affected by memory corruption, denial of service, and arbitrary code execution in libgit2",
  "details" : "The [libgit2](https://github.com/libgit2/libgit2/) project fixed three security issues in the 1.7.2 release. These issues are:\n\n* The `git_revparse_single` function can potentially enter an infinite loop on a well-crafted input, potentially causing a Denial of Service. This function is exposed in the `git2` crate via the [`Repository::revparse_single`](https://docs.rs/git2/latest/git2/struct.Repository.html#method.revparse_single) method.\n* The `git_index_add` function may cause heap corruption and possibly lead to arbitrary code execution. This function is exposed in the `git2` crate via the [`Index::add`](https://docs.rs/git2/latest/git2/struct.Index.html#method.add) method.\n* The smart transport negotiation may experience an out-of-bounds read when a remote server did not advertise capabilities.\n\nThe `libgit2-sys` crate bundles libgit2, or optionally links to a system libgit2 library. In either case, versions of the libgit2 library less than 1.7.2 are vulnerable. The 0.16.2 release of `libgit2-sys` bundles the fixed version of 1.7.2, and requires a system libgit2 version of at least 1.7.2.\n\nIt is recommended that all users upgrade.\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "libgit2-sys"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.16.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/rust-lang/git2-rs/pull/1017"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rust-lang/git2-rs/commit/9e57876be78924c1e5f3f268bb599e3981fe58bb"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/rust-lang/git2-rs"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2024-0013.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-02-12T15:42:14Z",
    "nvd_published_at" : null
  }
}