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CVE-2018-0733

Published: 27 March 2018

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).

Priority

Medium

CVSS 3 base score: 5.9

Status

Package Release Status
openssl
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable

Ubuntu 14.04 ESM (Trusty Tahr) Not vulnerable

openssl098
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was not-affected)
openssl1.0
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Notes

AuthorNote
mdeslaur
"The module can only be compiled by the HP-UX assembler, so
that only HP-UX PA-RISC targets are affected."

References