CVE-2018-0733

Public on 2018-08-22
Modified on 2018-08-23
Description
Because of an implementation bug the PA-RISC CRYPTO_memcmp function is effectively reduced to only comparing the least significant bit of each byte. This allows an attacker to forge messages that would be considered as authenticated in an amount of tries lower than that guaranteed by the security claims of the scheme. The module can only be compiled by the HP-UX assembler, so that only HP-UX PA-RISC targets are affected. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g).
Severity
Medium
CVSS v3 Base Score
4.8
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 openssl 2018-08-22 18:59 ALAS-2018-1065

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 4.8 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD CVSSv2 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N
NVD CVSSv3 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N