Description
SHA-1 is not collision resistant, which makes it easier for context-dependent attackers to conduct spoofing attacks, as demonstrated by attacks on the use of SHA-1 in TLS 1.2. NOTE: this CVE exists to provide a common identifier for referencing this SHA-1 issue; the existence of an identifier is not, by itself, a technology recommendation.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 6.0 | git | 2.45.1-1.1 | SUSE-SU-2025:20049-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | git | 2.33.0-1.3 | openSUSE-SU-2024:10786-1 |
| openSUSE Tumbleweed | libgit2 | 1.1.1-1.2 | openSUSE-SU-2024:10943-1 |
| openSUSE Tumbleweed | sha1collisiondetection | 1.0.3-4.12 | openSUSE-SU-2024:11377-1 |
Advisories 4
- SUSE-SU-2025:20049-1 Security update for git SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2024:11377-1 libsha1detectcoll-devel-1.0.3-4.12 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10786-1 git-2.33.0-1.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10943-1 libgit2-1_1-1.1.1-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://sites.google.com/site/itstheshappening
- 12577 vdb-entry
- http://shattered.io/
- https://www.schneier.com/blog/archives/2005/08/new_cryptanalyt.html
- http://www.cwi.nl/news/2017/cwi-and-google-announce-first-collision-industry-security-standard-sha-1
- http://ia.cr/2007/474
- https://security.googleblog.com/2017/02/announcing-first-sha1-collision.html
- https://security.googleblog.com/2015/12/an-update-on-sha-1-certificates-in.html
- https://www.schneier.com/blog/archives/2005/02/sha1_broken.html
- https://arstechnica.com/security/2017/02/at-deaths-door-for-years-widely-used-sha1-function-is-now-dead/
- https://kc.mcafee.com/corporate/index?page=content&id=SB10340