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CVE-2019-19906

Published: 19 December 2019

cyrus-sasl (aka Cyrus SASL) 2.1.27 has an out-of-bounds write leading to unauthenticated remote denial-of-service in OpenLDAP via a malformed LDAP packet. The OpenLDAP crash is ultimately caused by an off-by-one error in _sasl_add_string in common.c in cyrus-sasl.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
cyrus-sasl2
Launchpad, Ubuntu, Debian
upstream Needs triage

trusty
Released (2.1.25.dfsg1-17ubuntu0.1~esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
xenial
Released (2.1.26.dfsg1-14ubuntu0.2)
bionic
Released (2.1.27~101-g0780600+dfsg-3ubuntu2.1)
disco Ignored
(end of life)
eoan
Released (2.1.27+dfsg-1ubuntu0.1)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H