Vulnerability in OpenSSL
CVE-2014-3511
The ssl23_get_client_hello function in s23_srvr.c in OpenSSL 1.0.1 before 1.0.1i allows man-in-the-middle attackers to force the use of TLS 1.0 by triggering ClientHello message fragmentation in communication between a client and server that both support later TLS versions, related to a "protocol downgrade" issue.
Published · last modified .
CVSS v2 metric
CVSS v2 base score 4.3 (Medium). Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.141 (96.5th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.141 · newest: 0.141 · change: +0.001
Affected products
- OpenSSL — versions 1.0.0, 1.0.0a, 1.0.0b
Public proof-of-concept exploits
References
- lists.opensuse.org/opensuse-updates/2014-08/msg00036.html (vendor-advisory)
- linux.oracle.com/errata/ELSA-2014-1052.html
- secunia.com/advisories/60221 (third-party-advisory)
- www-01.ibm.com/support/docview.wss
- secunia.com/advisories/61184 (third-party-advisory)
- marc.info/ (vendor-advisory)
- secunia.com/advisories/60022 (third-party-advisory)
- www.openssl.org/news/secadv_20140806.txt (Vendor Advisory)
- secunia.com/advisories/61017 (third-party-advisory)
- rhn.redhat.com/errata/RHSA-2015-0197.html (vendor-advisory)
Frequently asked questions
- What is CVE-2014-3511?
- CVE-2014-3511 is a vulnerability in OpenSSL. Published 2014-08-13.
- Is CVE-2014-3511 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.