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CVE-2018-0734

Published: 30 October 2018

The OpenSSL DSA signature algorithm has been shown to be vulnerable to a timing side channel attack. An attacker could use variations in the signing algorithm to recover the private key. Fixed in OpenSSL 1.1.1a (Affected 1.1.1). Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i). Fixed in OpenSSL 1.0.2q (Affected 1.0.2-1.0.2p).

Notes

AuthorNote
mdeslaur
there are other similar commits in crypto/dsa/dsa_ossl.c that
likely need backporting also.
upstream advisory was ammended with more commits
Priority

Low

CVSS 3 base score: 5.9

Status

Package Release Status
openssl
Launchpad, Ubuntu, Debian
bionic
Released (1.1.0g-2ubuntu4.3)
cosmic
Released (1.1.1-1ubuntu2.1)
disco
Released (1.1.1a-1ubuntu2)
eoan
Released (1.1.1a-1ubuntu2)
focal
Released (1.1.1a-1ubuntu2)
groovy
Released (1.1.1a-1ubuntu2)
hirsute
Released (1.1.1a-1ubuntu2)
precise Ignored
(end of ESM support, was needed)
trusty
Released (1.0.1f-1ubuntu2.27)
upstream Needs triage

xenial
Released (1.0.2g-1ubuntu4.14)
Patches:
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=43e6a58d4991a451daf4891ff05a48735df871ac (1.0.2)
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=ebf65dbe1a67682d7e1f58db9c53ef737fb37f32 (1.0.2)
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=880d1c76ed9916cddb97fe05fb4c144f0f6f1012 (1.0.2)
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=f1b12b8713a739f27d74e6911580b2e70aea2fa4 (1.1.1)
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=8abfe72e8c1de1b95f50aa0d9134803b4d00070f (1.1.1)
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=6039651c43944cf4633483a74c2ef3a6b8c0c6c0 (1.1.1)
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=84862c0979737b591acb689aef41ae2644176f32 (1.1.0)
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=ef11e19d1365eea2b1851e6f540a0bf365d303e7 (1.1.0)
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=26d7fce13d469f8d1a1b42131467ed4a65f8137b (1.1.0)
openssl098
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

precise Does not exist

trusty Does not exist
(trusty was needs-triage)
upstream Needs triage

xenial Does not exist

openssl1.0
Launchpad, Ubuntu, Debian
bionic
Released (1.0.2n-1ubuntu5.2)
cosmic
Released (1.0.2n-1ubuntu6.1)
disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

precise Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist