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CVE-2018-0733

Incorrect CRYPTO_memcmp on HP-UX PA-RISC

Medium5.9EPSS 8.3%
Published
Updated
Reserved
Assigned by
openssl

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).

Scores

CVSS scores of CVE-2018-0733, by who scored it
Scored byCVSSScoreVector
NVDNVD · Modified3.0Medium5.9CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS (exploitation in 30 days)
8.3% · top 5.1% of all CVEs (2 Nov 2026)

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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.

Weakness

  • Message forgery

Affected products

  • OpenSSL · OpenSSL

    • affected Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g)

References (14)

Sources

The same CVE in the primary databases and aggregators, to check against.

Record last updated .