CVE-2015-4000

The TLS protocol 1.2 and earlier, when a DHE_EXPORT ciphersuite is enabled on a server but not on a client, does not properly convey a DHE_EXPORT choice, which allows man-in-the-middle attackers to conduct cipher-downgrade attacks by rewriting a ClientHello with DHE replaced by DHE_EXPORT and then rewriting a ServerHello with DHE_EXPORT replaced by DHE, aka the "Logjam" issue.

🔗 References (434)

• cve@mitrehttp://aix.software.ibm.com/aix/efixes/security/sendmail_advisory2.asc
• cve@mitrehttp://fortiguard.com/advisory/2015-07-09-cve-2015-1793-openssl-alternative-chains-certificate-forgery
• cve@mitrehttp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2015-008.txt.asc
• cve@mitrehttp://h20564.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c04876402
• cve@mitrehttp://h20564.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c04949778
• cve@mitrehttp://kb.juniper.net/InfoCenter/index?page=content&id=JSA10681
• cve@mitrehttp://kb.juniper.net/InfoCenter/index?page=content&id=JSA10727
• cve@mitrehttp://lists.apple.com/archives/security-announce/2015/Jun/msg00001.html
• cve@mitrehttp://lists.apple.com/archives/security-announce/2015/Jun/msg00002.html
• cve@mitrehttp://lists.fedoraproject.org/pipermail/package-announce/2015-June/159314.html
• cve@mitrehttp://lists.fedoraproject.org/pipermail/package-announce/2015-June/159351.html
• cve@mitrehttp://lists.fedoraproject.org/pipermail/package-announce/2015-June/160117.html
• cve@mitrehttp://lists.opensuse.org/opensuse-security-announce/2015-06/msg00023.html
• cve@mitrehttp://lists.opensuse.org/opensuse-security-announce/2015-06/msg00024.html
• cve@mitrehttp://lists.opensuse.org/opensuse-security-announce/2015-06/msg00026.html