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.
- Score
- CVSS 3.1 3.7 Low
- Status
- Modified - cve@mitre.org
- Published
- 2015-05-21
- Last modified
- 2026-05-27
- Weaknesses
- CWE-295, CWE-310
Affected products
- Iphone Os (Apple)
- Mac Os X (Apple)
- Safari (Apple)
- Ubuntu Linux (Canonical)
- Debian Linux (Debian)
- Chrome (Google)
- Hp-ux (Hp)
- Content Manager (Ibm)
- Internet Explorer (Microsoft)
- Firefox (Mozilla)
- Firefox Esr (Mozilla)
- Firefox Os (Mozilla)
- Network Security Services (Mozilla)
- Seamonkey (Mozilla)
- Thunderbird (Mozilla)
- Openssl (Openssl)
- Opera Browser (Opera)
- Jdk (Oracle)
- Jre (Oracle)
- Jrockit (Oracle)
- Sparc-opl Service Processor (Oracle)
- Linux Enterprise Desktop (Suse)
- Linux Enterprise Server (Suse)
- Linux Enterprise Software Development Kit (Suse)
- Suse Linux Enterprise Server (Suse)
References
- http://aix.software.ibm.com/aix/efixes/security/sendmail_advisory2.asc
- http://fortiguard.com/advisory/2015-07-09-cve-2015-1793-openssl-alternative-chains-certificate-forgery
- http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2015-008.txt.asc
- http://h20564.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c04876402
- http://h20564.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c04949778
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10681
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10727
- http://lists.apple.com/archives/security-announce/2015/Jun/msg00001.html
- http://lists.apple.com/archives/security-announce/2015/Jun/msg00002.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159314.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159351.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-June/160117.html
- http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00023.html
- http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00024.html
- http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00026.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00001.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00003.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00005.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00006.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00007.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00025.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00031.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00033.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00034.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00037.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00039.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00040.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00046.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00047.html
