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…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 14.1%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
Description
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.
- CVSS 2.0
- 4.3 MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N
- EPSS
- 14.13% probability · 96th percentile
- CISA KEV
- Not listed
- Affected
- openssl/openssl
- Source
- secalert@redhat.com
References
- ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2014-008.txt.asc
- http://aix.software.ibm.com/aix/efixes/security/openssl_advisory10.asc
- http://linux.oracle.com/errata/ELSA-2014-1052.html
- http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136470.html
- http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136473.html
- http://lists.opensuse.org/opensuse-updates/2014-08/msg00036.html
- http://marc.info/?l=bugtraq&m=142350350616251&w=2
- http://marc.info/?l=bugtraq&m=142495837901899&w=2
- http://marc.info/?l=bugtraq&m=142624590206005&w=2
- http://marc.info/?l=bugtraq&m=142660345230545&w=2
- http://marc.info/?l=bugtraq&m=142791032306609&w=2
- http://marc.info/?l=bugtraq&m=143290437727362&w=2
- http://marc.info/?l=bugtraq&m=143290522027658&w=2
- http://rhn.redhat.com/errata/RHSA-2015-0126.html
- http://rhn.redhat.com/errata/RHSA-2015-0197.html
- http://secunia.com/advisories/58962
- http://secunia.com/advisories/59700
- http://secunia.com/advisories/59710
- http://secunia.com/advisories/59756
- http://secunia.com/advisories/59887
- http://secunia.com/advisories/60022
- http://secunia.com/advisories/60221
- http://secunia.com/advisories/60377
- http://secunia.com/advisories/60493
- http://secunia.com/advisories/60684
- http://secunia.com/advisories/60803
- http://secunia.com/advisories/60810
- http://secunia.com/advisories/60890
- http://secunia.com/advisories/60917
- http://secunia.com/advisories/60921
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.