Login Request a demo
Low severity · published May 21, 2015
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…
3.7
CVSS
99.9%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)99.9% · higher than 100% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CH
Chrome · Google
All versions, or not specified · source: NVD
FI
Firefox · Mozilla
38.1.0; 39.0 · source: NVD
IO
iOS · Apple
through 8.3 · source: NVD
CM
Content Manager · Ibm
8.5 · source: NVD
DL
Debian Linux · Debian
7.0; 8.0 · source: NVD
FE
Firefox Esr · Mozilla
31.8 · source: NVD
FO
Firefox OS · Mozilla
2.2 · source: NVD
HP
Hp-ux · HP
b.11.31 · source: NVD
IE
Internet Explorer · Microsoft
All versions, or not specified · source: NVD
JD
Jdk · Oracle
1.6.0; 1.7.0; 1.7.0; 1.8.0; 1.8.0 · source: NVD
JR
Jre · Oracle
1.6.0; 1.7.0; 1.7.0; 1.8.0; 1.8.0 · source: NVD
JR
Jrockit · Oracle
r28.3.6 · source: NVD
Affected product
IO
iOS
Apple
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2015-4000
CVE.org
https://www.cve.org/CVERecord?id=CVE-2015-4000
Third Party Advisory
http://aix.software.ibm.com/aix/efixes/security/sendmail_advisory2.asc
Third Party Advisory
http://fortiguard.com/advisory/2015-07-09-cve-2015-1793-openssl-alternative-chains-certificate-forgery
Mailing List
http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2015-008.txt.asc
Third Party Advisory
http://h20564.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c04876402
Third Party Advisory
http://h20564.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c04949778
Third Party Advisory
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10681
More from iOS
10.0
CVE-2025-43300
Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability
10.0
CVE-2025-24201
Apple Multiple Products WebKit Out-of-Bounds Write Vulnerability
10.0
CVE-2025-24085
Apple Multiple Products Use-After-Free Vulnerability
9.8
CVE-2025-31200
Apple Multiple Products Memory Corruption Vulnerability
9.8
CVE-2025-31201
Apple Multiple Products Arbitrary Read and Write Vulnerability