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CVE Record

CVE-2018-0733: Incorrect CRYPTO_memcmp on HP-UX PA-RISC

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).

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

This is a narrow OpenSSL flaw affecting HP-UX PA-RISC builds only. A broken comparison could let an attacker make forged messages appear authenticated with fewer attempts than the cryptographic design promises. It matters for integrity-sensitive systems, but exposure is limited to legacy HP-UX PA-RISC deployments running OpenSSL 1.1.0 through 1.1.0g. Likely exposure is rare and legacy-specific: HP-UX on PA-RISC using OpenSSL 1.1.0 through 1.1.0g. Other architectures and non-HP-UX builds are not identified as affected in the provided sources. Treat this as a targeted legacy-platform remediation item, not a broad enterprise emergency. Prioritize if HP-UX PA-RISC remains in production or supports sensitive authentication, financial, operational, or customer-facing workloads. Mitigation focus: Upgrade affected OpenSSL deployments to 1.1.0h or later.; Identify HP-UX PA-RISC systems using OpenSSL 1.1.0 through 1.1.0g.; Check vendor advisories for bundled OpenSSL in appliances and commercial products..

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Potential ATT&CK relevance

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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11Source links

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Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
OpenSSLOpenSSLFixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g)Listed
Weakness

CWE details

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