Vulnerability CVE-2019-19906
Published: 2019-12-19

Description:
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.

Type:

CWE-787

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Debian -> Debian linux 
Cyrusimap -> Cyrus-sasl 

 References:
https://github.com/cyrusimap/cyrus-sasl/issues/587
https://lists.debian.org/debian-lts-announce/2019/12/msg00027.html
https://seclists.org/bugtraq/2019/Dec/42
https://www.debian.org/security/2019/dsa-4591
https://www.openldap.org/its/index.cgi/Incoming?id=9123
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