CVE-2019-1551

Published: 06 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
Upstream Needs triage

Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(code not built)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(code not built)
Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable
(code not built)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

nodejs
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(uses system openssl1.1)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(uses system openssl1.0)
Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable
(uses system openssl)
Ubuntu 14.04 ESM (Trusty Tahr) Not vulnerable
(uses system openssl)
openssl
Launchpad, Ubuntu, Debian
Upstream
Released (1.1.1.e)
Ubuntu 20.04 LTS (Focal Fossa)
Released (1.1.1f-1ubuntu1)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (1.1.1-1ubuntu2.1~18.04.6)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (1.0.2g-1ubuntu4.16)
Ubuntu 14.04 ESM (Trusty Tahr) Not vulnerable

Patches:
Upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=419102400a2811582a7a3d4a4e317d72e5ce0a8f (1.1)
Upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=f1c5eea8a817075d31e43f5876993c6710238c98 (1.0.2)
openssl1.0
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver)
Released (1.0.2n-1ubuntu5.4)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist