CVE-2018-0733
Incorrect CRYPTO_memcmp on HP-UX PA-RISC
- 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).
Timeline
ID reserved
By openssl
- 4 months later
· 4 months later
Published
- 6 years later
· 6 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium5.9 | CVSS: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 5.0% of all CVEs (8 Nov 2026)
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
References (14)
- https://www.tenable.com/security/tns-2018-07 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www.tenable.com/security/tns-2018-04 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- GLSA-201811-21 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- 103517 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://www.tenable.com/security/tns-2018-06 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://security.netapp.com/advisory/ntap-20180330-0002/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- 1040576 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=56d5a4bfcaf37fa420aef2bb881aa55e61cf5f2f (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www.openssl.org/news/secadv/20180327.txt (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2018-0733)Record last updated .