CVE-2018-0733

NameCVE-2018-0733
DescriptionBecause 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).
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
openssl (PTS)jessie1.0.1t-1+deb8u8fixed
jessie (security)1.0.1t-1+deb8u10fixed
stretch1.1.0f-3+deb9u2fixed
stretch (security)1.1.0j-1~deb9u1fixed
buster, sid1.1.1a-1fixed
openssl1.0 (PTS)stretch (security), stretch1.0.2l-2+deb9u3fixed
buster, sid1.0.2q-2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
opensslsource(unstable)1.1.0h-1unimportant
opensslsourcejessie(not affected)
opensslsourcestretch1.1.0f-3+deb9u2medium
opensslsourcewheezy(not affected)
openssl1.0source(unstable)(not affected)

Notes

[jessie] - openssl <not-affected> (vulnerable code not present)
[wheezy] - openssl <not-affected> (vulnerable code not present)
- openssl1.0 <not-affected> (Only affects OpenSSL 1.1.0)
Issue specific to HP-UX
https://www.openssl.org/news/secadv/20180327.txt

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