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.
Metrics
CVSS 3.1 5.9/10
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
References
- http://ia.cr/2007/474Third Party Advisory
- http://shattered.io/
- http://www.cwi.nl/news/2017/cwi-and-google-announce-first-collision-industry-security-standard-sha-1
- http://www.securityfocus.com/bid/12577
- 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
- https://security.googleblog.com/2015/12/an-update-on-sha-1-certificates-in.htmlThird Party Advisory
- https://security.googleblog.com/2017/02/announcing-first-sha1-collision.html
- https://sites.google.com/site/itstheshappeningThird Party Advisory
- https://www.schneier.com/blog/archives/2005/02/sha1_broken.htmlThird Party Advisory
- https://www.schneier.com/blog/archives/2005/08/new_cryptanalyt.htmlThird Party Advisory
- http://ia.cr/2007/474Third Party Advisory
- http://shattered.io/
- http://www.cwi.nl/news/2017/cwi-and-google-announce-first-collision-industry-security-standard-sha-1
- http://www.securityfocus.com/bid/12577
- 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
- https://security.googleblog.com/2015/12/an-update-on-sha-1-certificates-in.htmlThird Party Advisory
- https://security.googleblog.com/2017/02/announcing-first-sha1-collision.html
- https://sites.google.com/site/itstheshappeningThird Party Advisory
- https://www.schneier.com/blog/archives/2005/02/sha1_broken.htmlThird Party Advisory
- https://www.schneier.com/blog/archives/2005/08/new_cryptanalyt.htmlThird Party Advisory
Timeline
- Published
- Oct 14, 2016
- Last modified
- Jun 16, 2026
- NVD status
- Modified