CVE-2005-4900

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.

• CWE-326
• CWE-327

• 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

Published

Oct 14, 2016

Last Modified

Jun 16, 2026

Status

Modified

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