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CVE-2016-0701

Published: 28 January 2016

The DH_check_pub_key function in crypto/dh/dh_check.c in OpenSSL 1.0.2 before 1.0.2f does not ensure that prime numbers are appropriate for Diffie-Hellman (DH) key exchange, which makes it easier for remote attackers to discover a private DH exponent by making multiple handshakes with a peer that chose an inappropriate number, as demonstrated by a number in an X9.42 file.

Notes

AuthorNote
mdeslaur
1.0.2 only

Priority

Medium

CVSS 3 base score: 3.7

Status

Package Release Status
openssl
Launchpad, Ubuntu, Debian
vivid Not vulnerable
(1.0.1f-1ubuntu11.5)
upstream
Released (1.0.2f)
precise Not vulnerable

trusty Not vulnerable

wily
Released (1.0.2d-0ubuntu1.3)
Patches:
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=878e2c5b13010329c203f309ed0c8f2113f85648
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=c5b831f21d0d29d1e517d139d9d101763f60c9a2
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=75374adf8a6ff69d6718952121875a491ed2cd29
openssl098
Launchpad, Ubuntu, Debian
vivid Not vulnerable

upstream Not vulnerable

precise Not vulnerable

trusty Does not exist
(trusty was not-affected)
wily Does not exist