CVE-2019-1551
Public on 2019-12-06
Modified on 2024-03-14
Description
An integer overflow was found in the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit moduli. As per upstream:
* No EC algorithms are affected.
* 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
CVSS v3 Base Score
See breakdown
