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CVE-2019-1551

Published: 6 December 2019

There is an overflow bug in the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit moduli. No EC algorithms are affected. Analysis suggests that attacks against 2-prime RSA1024, 3-prime RSA1536, and DSA1024 as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH512 are considered just feasible. However, for an attack the target would have to re-use the DH512 private key, which is not recommended anyway. Also applications directly using the low level API BN_mod_exp may be affected if they use BN_FLG_CONSTTIME. Fixed in OpenSSL 1.1.1e (Affected 1.1.1-1.1.1d). Fixed in OpenSSL 1.0.2u (Affected 1.0.2-1.0.2t).

Priority

Low

CVSS 3 base score: 5.3

Status

Package Release Status
edk2
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code not built)
disco Ignored
(reached end-of-life)
eoan Not vulnerable
(code not built)
focal Not vulnerable
(code not built)
precise Does not exist

trusty Does not exist

upstream Needs triage

xenial Not vulnerable
(code not built)
nodejs
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(uses system openssl1.0)
disco Not vulnerable
(uses system openssl1.1)
eoan Not vulnerable
(uses system openssl1.1)
focal Not vulnerable
(uses system openssl1.1)
precise Does not exist

trusty Not vulnerable
(uses system openssl)
upstream Needs triage

xenial Not vulnerable
(uses system openssl)
openssl
Launchpad, Ubuntu, Debian
bionic
Released (1.1.1-1ubuntu2.1~18.04.6)
disco Ignored
(reached end-of-life)
eoan
Released (1.1.1c-1ubuntu4.1)
focal
Released (1.1.1f-1ubuntu1)
precise Not vulnerable

trusty Not vulnerable

upstream
Released (1.1.1.e)
xenial
Released (1.0.2g-1ubuntu4.16)
openssl1.0
Launchpad, Ubuntu, Debian
bionic
Released (1.0.2n-1ubuntu5.4)
disco Does not exist

eoan Does not exist

focal Does not exist

precise Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist