Vulnerability in Apple Iphone OS
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.
Vulnerability class: POODLE (CVE-2014-3566)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.999 (100.0th percentile), scored .
Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 100.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.999 · newest: 0.999 · change: 0.000
Affected products
- Apple Iphone OS
- Apple Mac OS X
- Apple Safari
- Google Chrome
- HP Hp-Ux — versions b.11.31
- IBM Content Manager — versions 8.5
- Microsoft Internet Explorer
- Mozilla Firefox — versions 38.1.0, 39.0
- Mozilla Firefox Esr — versions 31.8
- Mozilla Firefox OS — versions 2.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.opensuse.org/opensuse-security-announce/2015-07/msg00006.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2015-07/msg00001.html (vendor-advisory, Mailing List, Third Party Advisory)
- marc.info/ (vendor-advisory, Mailing List, Third Party Advisory)
- rhn.redhat.com/errata/RHSA-2015-1243.html (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2015-07/msg00025.html (vendor-advisory, Mailing List, Third Party Advisory)
- www.securitytracker.com/id/1033208 (VDB Entry, Third Party Advisory, vdb-entry)
- www.securitytracker.com/id/1032637 (VDB Entry, Third Party Advisory, vdb-entry)
- marc.info/ (vendor-advisory, Mailing List, Third Party Advisory)
- www.debian.org/security/2016/dsa-3688 (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2015/dsa-3287 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2015-4000?
- CVE-2015-4000 is a low-severity vulnerability in Apple Iphone OS, classified under Cryptographic Issues. CVSS score: 3.7/10. Published 2015-05-21.
- How severe is CVE-2015-4000?
- Low severity. CVSS v3 base score is 3.7 out of 10.
- Is CVE-2015-4000 known to be exploited?
- 73 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.