CVE-2022-24765
Vulnérabilité moyenne dans git (git-for-windows)
Description
Git for Windows is a fork of Git containing Windows-specific patches. This vulnerability affects users working on multi-user machines, where untrusted parties have write access to the same hard disk. Those untrusted parties could create the folder `C:\.git`, which would be picked up by Git operations run supposedly outside a repository while searching for a Git directory. Git would then respect any config in said Git directory. Git Bash users who set `GIT_PS1_SHOWDIRTYSTATE` are vulnerable as well. Users who installed posh-gitare vulnerable simply by starting a PowerShell. Users of IDEs such as Visual Studio are vulnerable: simply creating a new project would already read and respect the config specified in `C:\.git\config`. Users of the Microsoft fork of Git are vulnerable simply by starting a Git Bash. The problem has been patched in Git for Windows v2.35.2. Users unable to upgrade may create the folder `.git` on all drives where Git commands are run, and remove read/write access from those folders as a workaround. Alternatively, define or extend `GIT_CEILING_DIRECTORIES` to cover the _parent_ directory of the user profile, e.g. `C:\Users` if the user profile is located in `C:\Users\my-user-name`.
Gravité et risque d'exploitation
CVE-2022-24765 obtient un score CVSS de 6.0/10, soit une gravité moyenne. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 1.01 %, ce qui la place devant 62.5 % des CVE référencées.
Que faire ?
- Vérifiez si git (versions < 2.35.2) est présent sur votre parc.
- Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
- À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
- Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.
Références
- https://github.com/git-for-windows/git/security/advisories/GHSA-vw2c-22j4-2fh2
- https://git-scm.com/book/en/v2/Appendix-A%3A-Git-in-Other-Environments-Git-in-Bash
- https://git-scm.com/docs/git#Documentation/git.txt-codeGITCEILINGDIRECTORIEScode
- http://www.openwall.com/lists/oss-security/2022/04/12/7
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5PTN5NYEHYN2OQSHSAMCNICZNK2U4QH6/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BENQYTDGUL6TF3UALY6GSIEXIHUIYNWM/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SLP42KIZ6HACTVZMZLJLFJQ4W2XYT27M/
- https://support.apple.com/kb/HT213261
- http://seclists.org/fulldisclosure/2022/May/31
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRZG5CDUQ27OWTPC5MQOR4UASNXHWEZS/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DDI325LOO2XBDDKLINOAQJEG6MHAURZE/
- https://lists.debian.org/debian-lts-announce/2022/12/msg00025.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DIKWISWUDFT2FAITYIA6372BVLH3OOOC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YROCMBWYFKRSS64PO6FUNM6L7LKBUKVW/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HVOLER2PIGMHPQMDGG4RDE2KZB74QLA2/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UDZRZAL7QULOB6V7MKT66MOMWJLBJPX4/
- https://security.gentoo.org/glsa/202312-15