#VU23796 Out-of-bounds write in Cyrus SASL - CVE-2019-19906
Published: December 23, 2019 / Updated: February 8, 2022
Vulnerability identifier: #VU23796
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-19906
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Cyrus SASL
Cyrus SASL
Software vendor:
Carnegie Mellon University
Carnegie Mellon University
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an out-of-bounds write error when processing LDAP queries within the _sasl_add_string() function in common.c file in cyrus-sasl. A remote non-authenticated attacker can create a specially LDAP request to the affected server, trigger off-by-one error in OpenLDAP implementation and crash the service.
Remediation
Install update from vendor's website.