CVE-2021-21300

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.
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*
cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*
cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*
cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*
cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*
cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*
cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*
cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*
cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*
cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*
cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*
cpe:2.3:a:git-scm:git:2.27.0:*:*:*:*:*:*:*
cpe:2.3:a:git-scm:git:2.28.0:*:*:*:*:*:*:*
cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*
cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

Configuration 3 (hide)

AND
cpe:2.3:a:apple:xcode:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

History

23 Sep 2021, 12:45

Type Values Removed Values Added
References (MISC) http://packetstormsecurity.com/files/163978/Git-LFS-Clone-Command-Execution.html - (MISC) http://packetstormsecurity.com/files/163978/Git-LFS-Clone-Command-Execution.html - Exploit, Third Party Advisory, VDB Entry

31 Aug 2021, 18:15

Type Values Removed Values Added
References
  • (MISC) http://packetstormsecurity.com/files/163978/Git-LFS-Clone-Command-Execution.html -

05 May 2021, 14:23

Type Values Removed Values Added
References (FULLDISC) http://seclists.org/fulldisclosure/2021/Apr/60 - (FULLDISC) http://seclists.org/fulldisclosure/2021/Apr/60 - Mailing List, Third Party Advisory
References (GENTOO) https://security.gentoo.org/glsa/202104-01 - (GENTOO) https://security.gentoo.org/glsa/202104-01 - Third Party Advisory

01 May 2021, 02:15

Type Values Removed Values Added
References
  • (GENTOO) https://security.gentoo.org/glsa/202104-01 -

27 Apr 2021, 21:15

Type Values Removed Values Added
References
  • (FULLDISC) http://seclists.org/fulldisclosure/2021/Apr/60 -

27 Apr 2021, 19:11

Type Values Removed Values Added
CPE cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
cpe:2.3:a:apple:xcode:*:*:*:*:*:*:*:*
References (CONFIRM) https://support.apple.com/kb/HT212320 - (CONFIRM) https://support.apple.com/kb/HT212320 - Third Party Advisory

26 Apr 2021, 21:15

Type Values Removed Values Added
References
  • (CONFIRM) https://support.apple.com/kb/HT212320 -

26 Mar 2021, 02:01

Type Values Removed Values Added
References (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BBPNGLQSYJHLZZ37BO42YY6S5OTIF4L4/ - (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BBPNGLQSYJHLZZ37BO42YY6S5OTIF4L4/ - Mailing List, Third Party Advisory
References (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LMXX2POK5X576BSDWSXGU7EIK6I72ERU/ - Third Party Advisory (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LMXX2POK5X576BSDWSXGU7EIK6I72ERU/ - Mailing List, Third Party Advisory
CPE cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

19 Mar 2021, 23:15

Type Values Removed Values Added
References
  • (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BBPNGLQSYJHLZZ37BO42YY6S5OTIF4L4/ -

16 Mar 2021, 16:59

Type Values Removed Values Added
References (MISC) https://github.com/git/git/commit/684dd4c2b414bcf648505e74498a608f28de4592 - (MISC) https://github.com/git/git/commit/684dd4c2b414bcf648505e74498a608f28de4592 - Patch, Third Party Advisory
References (MISC) https://git-scm.com/docs/gitattributes#_filter - (MISC) https://git-scm.com/docs/gitattributes#_filter - Vendor Advisory
References (MISC) https://lore.kernel.org/git/xmqqim6019yd.fsf@gitster.c.googlers.com/ - (MISC) https://lore.kernel.org/git/xmqqim6019yd.fsf@gitster.c.googlers.com/ - Release Notes, Third Party Advisory
References (CONFIRM) https://github.com/git/git/security/advisories/GHSA-8prw-h3cq-mghm - (CONFIRM) https://github.com/git/git/security/advisories/GHSA-8prw-h3cq-mghm - Third Party Advisory
References (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LCLJJLKKMS5WRFO6C475AOUZTWQLIARX/ - (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LCLJJLKKMS5WRFO6C475AOUZTWQLIARX/ - Third Party Advisory
References (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LMXX2POK5X576BSDWSXGU7EIK6I72ERU/ - (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LMXX2POK5X576BSDWSXGU7EIK6I72ERU/ - Third Party Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2021/03/09/3 - (MLIST) http://www.openwall.com/lists/oss-security/2021/03/09/3 - Exploit, Mailing List, Third Party Advisory
References (MISC) https://git-scm.com/docs/git-config#Documentation/git-config.txt-coresymlinks - (MISC) https://git-scm.com/docs/git-config#Documentation/git-config.txt-coresymlinks - Vendor Advisory
CPE cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
cpe:2.3:a:git-scm:git:2.28.0:*:*:*:*:*:*:*
cpe:2.3:a:git-scm:git:2.27.0:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown
v2 : 5.1
v3 : 7.5

15 Mar 2021, 22:15

Type Values Removed Values Added
References
  • (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LMXX2POK5X576BSDWSXGU7EIK6I72ERU/ -

12 Mar 2021, 02:15

Type Values Removed Values Added
References
  • (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LCLJJLKKMS5WRFO6C475AOUZTWQLIARX/ -

10 Mar 2021, 01:15

Type Values Removed Values Added
CWE CWE-59
References
  • (MLIST) http://www.openwall.com/lists/oss-security/2021/03/09/3 -

09 Mar 2021, 20:15

Type Values Removed Values Added
New CVE

Information

Published : 2021-03-09 20:15

Updated : 2021-09-23 12:45


NVD link : CVE-2021-21300

Mitre link : CVE-2021-21300


JSON object : View

Products Affected

fedoraproject

  • fedora

apple

  • macos
  • xcode

git-scm

  • git
CWE
CWE-59

Improper Link Resolution Before File Access ('Link Following')