What is the CVSS score of CVE-2019-19906?

CVE-2019-19906 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 8.0%.

Is there a public PoC exploit available for CVE-2019-19906?

Yes, a public proof-of-concept exploit is available for CVE-2019-19906. Prioritise patching immediately. EPSS: 8.0%.

Is there a patch available for CVE-2019-19906?

Yes, a patch is available for CVE-2019-19906. Update the affected software to the latest version immediately.

Cyrus Sasl CVE-2019-19906

HIGH

Off-by-one Error (CWE-193)

2019-12-19 cve@mitre.org

Buffer Overflow Cyrus Sasl Debian Linux Ubuntu Linux Fedora Jboss Enterprise Web Server Mac Os X Enterprise Linux Enterprise Linux Eus Enterprise Linux For Ibm Z Systems Enterprise Linux For Ibm Z Systems Eus Enterprise Linux For Power Little Endian Enterprise Linux For Power Little Endian Eus Enterprise Linux Server Aus Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions Enterprise Linux Server Tus Enterprise Linux Server Update Services For Sap Solutions Ipados Iphone Os Bookkeeper

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

CVE Published

Dec 19, 2019 - 18:15 nvd

HIGH 7.5

DescriptionNVD

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.

AnalysisAI

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. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-193. 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. Affected products include: Cyrusimap Cyrus-Sasl, Debian Debian Linux, Canonical Ubuntu Linux, Fedoraproject Fedora, Redhat Jboss Enterprise Web Server.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.