MGASA-2020-0023 - Updated openssl packages fix security vulnerability

Publication date: 05 Jan 2020
URL: https://advisories.mageia.org/MGASA-2020-0023.html
Type: security
Affected Mageia releases: 7
CVE: CVE-2019-1551

Updated compat-openssl10 and openssl packages fix security vulnerability:

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 (CVE-2019-1551).

References:
- https://bugs.mageia.org/show_bug.cgi?id=25977
- https://www.openssl.org/news/secadv/20191206.txt
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-1551

SRPMS:
- 7/core/openssl-1.1.0l-1.1.mga7
- 7/core/compat-openssl10-1.0.2u-1.mga7