CVE-2018-0733
5.9
MEDIUM
CVSS 3.1
EPSS 2.2%
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).
How to fix CVE-2018-0733
To remediate CVE-2018-0733, upgrade the affected package to a fixed version below.
- —upgrade to 1.0.2o-r0 or later
- —upgrade to 1.1.0h-1 or later
Is CVE-2018-0733 being exploited?
Low — EPSS is 2.2%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1.0.2o-r0
- from 0, < 1.1.0h-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |