CVE-2019-1551

Priority
Description
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-dev (Affected 1.1.1-1.1.1d).
Fixed in OpenSSL 1.0.2u-dev (Affected 1.0.2-1.0.2t).
Notes
Package
Source: edk2 (LP Ubuntu Debian)
Upstream:needs-triage
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):needs-triage
Ubuntu 18.04 LTS (Bionic Beaver):needs-triage
Ubuntu 19.04 (Disco Dingo):ignored (reached end-of-life)
Ubuntu 19.10 (Eoan Ermine):needs-triage
Ubuntu 20.04 (Focal Fossa):needs-triage
Package
Upstream:needs-triage
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):not-affected (uses system openssl)
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (uses system openssl)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (uses system openssl1.0)
Ubuntu 19.04 (Disco Dingo):not-affected (uses system openssl1.1)
Ubuntu 19.10 (Eoan Ermine):not-affected (uses system openssl1.1)
Ubuntu 20.04 (Focal Fossa):not-affected (uses system openssl1.1)
Package
Upstream:needs-triage
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):needed
Ubuntu 19.04 (Disco Dingo):DNE
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 (Focal Fossa):DNE
More Information

Updated: 2020-01-23 20:48:02 UTC (commit b4629892d998f2ede31f59bb7508dc50a92ac664)