USN-4761-1

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/notices/USN-4761-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4761-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-4761-1
Upstream
Related
Published
2021-03-09T18:25:05.360601Z
Modified
2025-10-13T04:35:23Z
Summary
git vulnerability
Details

Matheus Tavares discovered that Git incorrectly handled delay-capable clean/smudge filters when being used on case-insensitive filesystems. A remote attacker could possibly use this issue to execute arbitrary code.

References

Affected packages

Ubuntu:16.04:LTS / git

Package

Name
git
Purl
pkg:deb/ubuntu/git@1:2.7.4-0ubuntu1.10?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:2.7.4-0ubuntu1.10

Affected versions

1:2.*

1:2.5.0-1
1:2.6.2-1
1:2.6.3-1
1:2.6.4-1
1:2.7.0~rc3-1
1:2.7.0-1
1:2.7.3-0ubuntu1
1:2.7.4-0ubuntu1
1:2.7.4-0ubuntu1.1
1:2.7.4-0ubuntu1.2
1:2.7.4-0ubuntu1.3
1:2.7.4-0ubuntu1.4
1:2.7.4-0ubuntu1.5
1:2.7.4-0ubuntu1.6
1:2.7.4-0ubuntu1.7
1:2.7.4-0ubuntu1.8
1:2.7.4-0ubuntu1.9

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "git",
            "binary_version": "1:2.7.4-0ubuntu1.10"
        },
        {
            "binary_name": "git-all",
            "binary_version": "1:2.7.4-0ubuntu1.10"
        },
        {
            "binary_name": "git-arch",
            "binary_version": "1:2.7.4-0ubuntu1.10"
        },
        {
            "binary_name": "git-core",
            "binary_version": "1:2.7.4-0ubuntu1.10"
        },
        {
            "binary_name": "git-cvs",
            "binary_version": "1:2.7.4-0ubuntu1.10"
        },
        {
            "binary_name": "git-daemon-run",
            "binary_version": "1:2.7.4-0ubuntu1.10"
        },
        {
            "binary_name": "git-daemon-sysvinit",
            "binary_version": "1:2.7.4-0ubuntu1.10"
        },
        {
            "binary_name": "git-el",
            "binary_version": "1:2.7.4-0ubuntu1.10"
        },
        {
            "binary_name": "git-email",
            "binary_version": "1:2.7.4-0ubuntu1.10"
        },
        {
            "binary_name": "git-gui",
            "binary_version": "1:2.7.4-0ubuntu1.10"
        },
        {
            "binary_name": "git-man",
            "binary_version": "1:2.7.4-0ubuntu1.10"
        },
        {
            "binary_name": "git-mediawiki",
            "binary_version": "1:2.7.4-0ubuntu1.10"
        },
        {
            "binary_name": "git-svn",
            "binary_version": "1:2.7.4-0ubuntu1.10"
        },
        {
            "binary_name": "gitk",
            "binary_version": "1:2.7.4-0ubuntu1.10"
        },
        {
            "binary_name": "gitweb",
            "binary_version": "1:2.7.4-0ubuntu1.10"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:16.04:LTS",
    "cves": [
        {
            "id": "CVE-2021-21300",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

Ubuntu:18.04:LTS / git

Package

Name
git
Purl
pkg:deb/ubuntu/git@1:2.17.1-1ubuntu0.8?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:2.17.1-1ubuntu0.8

Affected versions

1:2.*

1:2.14.1-1ubuntu4
1:2.15.1-1ubuntu2
1:2.17.0-1ubuntu1
1:2.17.1-1ubuntu0.1
1:2.17.1-1ubuntu0.3
1:2.17.1-1ubuntu0.4
1:2.17.1-1ubuntu0.5
1:2.17.1-1ubuntu0.6
1:2.17.1-1ubuntu0.7

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "git",
            "binary_version": "1:2.17.1-1ubuntu0.8"
        },
        {
            "binary_name": "git-all",
            "binary_version": "1:2.17.1-1ubuntu0.8"
        },
        {
            "binary_name": "git-cvs",
            "binary_version": "1:2.17.1-1ubuntu0.8"
        },
        {
            "binary_name": "git-daemon-run",
            "binary_version": "1:2.17.1-1ubuntu0.8"
        },
        {
            "binary_name": "git-daemon-sysvinit",
            "binary_version": "1:2.17.1-1ubuntu0.8"
        },
        {
            "binary_name": "git-el",
            "binary_version": "1:2.17.1-1ubuntu0.8"
        },
        {
            "binary_name": "git-email",
            "binary_version": "1:2.17.1-1ubuntu0.8"
        },
        {
            "binary_name": "git-gui",
            "binary_version": "1:2.17.1-1ubuntu0.8"
        },
        {
            "binary_name": "git-man",
            "binary_version": "1:2.17.1-1ubuntu0.8"
        },
        {
            "binary_name": "git-mediawiki",
            "binary_version": "1:2.17.1-1ubuntu0.8"
        },
        {
            "binary_name": "git-svn",
            "binary_version": "1:2.17.1-1ubuntu0.8"
        },
        {
            "binary_name": "gitk",
            "binary_version": "1:2.17.1-1ubuntu0.8"
        },
        {
            "binary_name": "gitweb",
            "binary_version": "1:2.17.1-1ubuntu0.8"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:18.04:LTS",
    "cves": [
        {
            "id": "CVE-2021-21300",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

Ubuntu:20.04:LTS / git

Package

Name
git
Purl
pkg:deb/ubuntu/git@1:2.25.1-1ubuntu3.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:2.25.1-1ubuntu3.1

Affected versions

1:2.*

1:2.20.1-2ubuntu1
1:2.24.0-1ubuntu1
1:2.24.0-1ubuntu2
1:2.25.0-1ubuntu1
1:2.25.1-1ubuntu1
1:2.25.1-1ubuntu2
1:2.25.1-1ubuntu3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "git",
            "binary_version": "1:2.25.1-1ubuntu3.1"
        },
        {
            "binary_name": "git-all",
            "binary_version": "1:2.25.1-1ubuntu3.1"
        },
        {
            "binary_name": "git-cvs",
            "binary_version": "1:2.25.1-1ubuntu3.1"
        },
        {
            "binary_name": "git-daemon-run",
            "binary_version": "1:2.25.1-1ubuntu3.1"
        },
        {
            "binary_name": "git-daemon-sysvinit",
            "binary_version": "1:2.25.1-1ubuntu3.1"
        },
        {
            "binary_name": "git-el",
            "binary_version": "1:2.25.1-1ubuntu3.1"
        },
        {
            "binary_name": "git-email",
            "binary_version": "1:2.25.1-1ubuntu3.1"
        },
        {
            "binary_name": "git-gui",
            "binary_version": "1:2.25.1-1ubuntu3.1"
        },
        {
            "binary_name": "git-man",
            "binary_version": "1:2.25.1-1ubuntu3.1"
        },
        {
            "binary_name": "git-mediawiki",
            "binary_version": "1:2.25.1-1ubuntu3.1"
        },
        {
            "binary_name": "git-svn",
            "binary_version": "1:2.25.1-1ubuntu3.1"
        },
        {
            "binary_name": "gitk",
            "binary_version": "1:2.25.1-1ubuntu3.1"
        },
        {
            "binary_name": "gitweb",
            "binary_version": "1:2.25.1-1ubuntu3.1"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:20.04:LTS",
    "cves": [
        {
            "id": "CVE-2021-21300",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}