CVE-2020-36221

Name	CVE-2020-36221
Description	An 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).
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-2544-1, DSA-4845-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
openldap (PTS)	bullseye (security), bullseye	2.4.57+dfsg-3+deb11u1	fixed
	bookworm	2.5.13+dfsg-5	fixed
	sid, trixie	2.5.18+dfsg-3	fixed

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

Package	Type	Release	Fixed Version	Origin
openldap	source	stretch	2.4.44+dfsg-5+deb9u7	DLA-2544-1
openldap	source	buster	2.4.47+dfsg-3+deb10u5	DSA-4845-1
openldap	source	(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)