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 (Affected 1.1.1-1.1.1d). Fixed in
OpenSSL 1.0.2u (Affected 1.0.2-1.0.2t).
Assigned-to
mdeslaur
Notes
mdeslauraffected file isn't built in edk2
Package
Source: edk2 (LP Ubuntu Debian)
Upstream:needs-triage
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (code not built)
Ubuntu 20.04 LTS (Focal Fossa):not-affected (code not built)
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Patches:
Package
Upstream:needs-triage
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (uses system openssl1.0)
Ubuntu 20.04 LTS (Focal Fossa):not-affected (uses system openssl1.1)
Ubuntu 14.04 ESM (Trusty Tahr):not-affected (uses system openssl)
Patches:
Package
Upstream:released (1.1.1.e)
Ubuntu 18.04 LTS (Bionic Beaver):released (1.1.1-1ubuntu2.1~18.04.6)
Ubuntu 20.04 LTS (Focal Fossa):released (1.1.1f-1ubuntu1)
Ubuntu 14.04 ESM (Trusty Tahr):not-affected
Ubuntu 16.06 ESM (Xenial Xerus):released (1.0.2g-1ubuntu4.16)
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)
Package
Upstream:needs-triage
Ubuntu 18.04 LTS (Bionic Beaver):released (1.0.2n-1ubuntu5.4)
Ubuntu 20.04 LTS (Focal Fossa):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Patches:
More Information

Updated: 2021-10-21 05:49:56 UTC (commit 1bbbce2fb1a3c15b20fcf10f0073e1fb6ad43ae6)