CVE-2020-36221

NameCVE-2020-36221
DescriptionAn integer underflow was discovered in OpenLDAP before 2.4.57 leading to slapd crashes in the Certificate Exact Assertion processing, resulting in denial of service (schema_init.c serialNumberAndIssuerCheck).
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)
ReferencesDLA-2544-1, DSA-4845-1, ELA-358-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
openldap (PTS)jessie, jessie (lts)2.4.40+dfsg-1+deb8u11fixed
stretch (security), stretch (lts), stretch2.4.44+dfsg-5+deb9u9fixed
buster, buster (security)2.4.47+dfsg-3+deb10u7fixed
bullseye (security), bullseye2.4.57+dfsg-3+deb11u1fixed
bookworm2.5.12+dfsg-2fixed
sid2.5.13+dfsg-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
openldapsourcejessie2.4.40+dfsg-1+deb8u9ELA-358-1
openldapsourcestretch2.4.44+dfsg-5+deb9u7DLA-2544-1
openldapsourcebuster2.4.47+dfsg-3+deb10u5DSA-4845-1
openldapsource(unstable)2.4.57+dfsg-1

Notes

https://bugs.openldap.org/show_bug.cgi?id=9404
https://git.openldap.org/openldap/openldap/-/commit/38ac838e4150c626bbfa0082b7e2cf3a2bb4df31 (OPENLDAP_REL_ENG_2_4_57)
https://bugs.openldap.org/show_bug.cgi?id=9424
https://git.openldap.org/openldap/openldap/-/commit/58c1748e81c843c5b6e61648d2a4d1d82b47e842 (OPENLDAP_REL_ENG_2_4_57)

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