CVE-2019-19906

high-risk
Published 2019-12-19

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.

Do I need to act?

-
0.35% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (20)

Cyrus-Sasl

Affected Vendors

Debian Redhat Apache Apple Cyrusimap Canonical Fedoraproject

References (30)

Mailing List http://seclists.org/fulldisclosure/2020/Jul/23
Mailing List http://seclists.org/fulldisclosure/2020/Jul/24
Mailing List http://www.openwall.com/lists/oss-security/2022/02/23/4
Patch https://github.com/cyrusimap/cyrus-sasl/issues/587
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e3...
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8...
Mailing List https://lists.debian.org/debian-lts-announce/2019/12/msg00027.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...
Mailing List https://seclists.org/bugtraq/2019/Dec/42
Third Party Advisory https://support.apple.com/kb/HT211288
Third Party Advisory https://support.apple.com/kb/HT211289
Patch https://usn.ubuntu.com/4256-1/
Third Party Advisory https://www.debian.org/security/2019/dsa-4591
Exploit https://www.openldap.org/its/index.cgi/Incoming?id=9123
Mailing List http://seclists.org/fulldisclosure/2020/Jul/23
Mailing List http://seclists.org/fulldisclosure/2020/Jul/24
Mailing List http://www.openwall.com/lists/oss-security/2022/02/23/4
Patch https://github.com/cyrusimap/cyrus-sasl/issues/587
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e3...
and 10 more references
53
/ 100
high-risk
Severity 26/34 · High
Exploitability 1/34 · Minimal
Exposure 26/34 · High