UBUNTU-CVE-2021-21300

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Source

https://ubuntu.com/security/CVE-2021-21300

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-21300.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-21300

Related

Published

2021-03-09T18:00:00Z

Modified

2021-03-09T18:00:00Z

Severity

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

Summary

[none]

Details

Git is an open-source distributed revision control system. In affected versions of Git a specially crafted repository that contains symbolic links as well as files using a clean/smudge filter such as Git LFS, may cause just-checked out script to be executed while cloning onto a case-insensitive file system such as NTFS, HFS+ or APFS (i.e. the default file systems on Windows and macOS). Note that clean/smudge filters have to be configured for that. Git for Windows configures Git LFS by default, and is therefore vulnerable. The problem has been patched in the versions published on Tuesday, March 9th, 2021. As a workaound, if symbolic link support is disabled in Git (e.g. via git config --global core.symlinks false), the described attack won't work. Likewise, if no clean/smudge filters such as Git LFS are configured globally (i.e. before cloning), the attack is foiled. As always, it is best to avoid cloning repositories from untrusted sources. The earliest impacted version is 2.14.2. The fix versions are: 2.30.1, 2.29.3, 2.28.1, 2.27.1, 2.26.3, 2.25.5, 2.24.4, 2.23.4, 2.22.5, 2.21.4, 2.20.5, 2.19.6, 2.18.5, 2.17.62.17.6.

References

Affected packages

Ubuntu:16.04:LTS / git

Package

Name: git
Purl: pkg:deb/ubuntu/git?arch=src?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

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "1:2.7.4-0ubuntu1.10",
            "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-doc"
        },
        {
            "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"
        }
    ]
}

Ubuntu:18.04:LTS / git

Package

Name: git
Purl: pkg:deb/ubuntu/git?arch=src?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

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "1:2.17.1-1ubuntu0.8",
            "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-dbgsym"
        },
        {
            "binary_version": "1:2.17.1-1ubuntu0.8",
            "binary_name": "git-doc"
        },
        {
            "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"
        }
    ]
}

Ubuntu:20.04:LTS / git

Package

Name: git
Purl: pkg:deb/ubuntu/git?arch=src?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

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "1:2.25.1-1ubuntu3.1",
            "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-dbgsym"
        },
        {
            "binary_version": "1:2.25.1-1ubuntu3.1",
            "binary_name": "git-doc"
        },
        {
            "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"
        }
    ]
}