UBUNTU-CVE-2021-21300

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Source
https://ubuntu.com/security/notices/UBUNTU-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@1:2.7.4-0ubuntu1.10?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": [
        {
            "git-core": "1:2.7.4-0ubuntu1.10",
            "git-daemon-run": "1:2.7.4-0ubuntu1.10",
            "git-email": "1:2.7.4-0ubuntu1.10",
            "git-mediawiki": "1:2.7.4-0ubuntu1.10",
            "git": "1:2.7.4-0ubuntu1.10",
            "git-el": "1:2.7.4-0ubuntu1.10",
            "git-cvs": "1:2.7.4-0ubuntu1.10",
            "git-doc": "1:2.7.4-0ubuntu1.10",
            "gitk": "1:2.7.4-0ubuntu1.10",
            "git-arch": "1:2.7.4-0ubuntu1.10",
            "git-daemon-sysvinit": "1:2.7.4-0ubuntu1.10",
            "git-svn": "1:2.7.4-0ubuntu1.10",
            "git-gui": "1:2.7.4-0ubuntu1.10",
            "git-man": "1:2.7.4-0ubuntu1.10",
            "gitweb": "1:2.7.4-0ubuntu1.10",
            "git-all": "1:2.7.4-0ubuntu1.10"
        }
    ]
}

Ubuntu:18.04:LTS / git

Package

Name
git
Purl
pkg:deb/ubuntu/git@1:2.17.1-1ubuntu0.8?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": [
        {
            "git-daemon-run": "1:2.17.1-1ubuntu0.8",
            "git-email": "1:2.17.1-1ubuntu0.8",
            "git-mediawiki": "1:2.17.1-1ubuntu0.8",
            "git": "1:2.17.1-1ubuntu0.8",
            "git-el": "1:2.17.1-1ubuntu0.8",
            "git-cvs": "1:2.17.1-1ubuntu0.8",
            "git-doc": "1:2.17.1-1ubuntu0.8",
            "gitk": "1:2.17.1-1ubuntu0.8",
            "git-dbgsym": "1:2.17.1-1ubuntu0.8",
            "git-daemon-sysvinit": "1:2.17.1-1ubuntu0.8",
            "git-svn": "1:2.17.1-1ubuntu0.8",
            "git-gui": "1:2.17.1-1ubuntu0.8",
            "git-man": "1:2.17.1-1ubuntu0.8",
            "gitweb": "1:2.17.1-1ubuntu0.8",
            "git-all": "1:2.17.1-1ubuntu0.8"
        }
    ]
}

Ubuntu:20.04:LTS / git

Package

Name
git
Purl
pkg:deb/ubuntu/git@1:2.25.1-1ubuntu3.1?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": [
        {
            "git-daemon-run": "1:2.25.1-1ubuntu3.1",
            "git-email": "1:2.25.1-1ubuntu3.1",
            "git-mediawiki": "1:2.25.1-1ubuntu3.1",
            "git": "1:2.25.1-1ubuntu3.1",
            "git-el": "1:2.25.1-1ubuntu3.1",
            "git-cvs": "1:2.25.1-1ubuntu3.1",
            "git-doc": "1:2.25.1-1ubuntu3.1",
            "gitk": "1:2.25.1-1ubuntu3.1",
            "git-dbgsym": "1:2.25.1-1ubuntu3.1",
            "git-daemon-sysvinit": "1:2.25.1-1ubuntu3.1",
            "git-svn": "1:2.25.1-1ubuntu3.1",
            "git-gui": "1:2.25.1-1ubuntu3.1",
            "git-man": "1:2.25.1-1ubuntu3.1",
            "gitweb": "1:2.25.1-1ubuntu3.1",
            "git-all": "1:2.25.1-1ubuntu3.1"
        }
    ]
}