CVE-2019-19906
HIGHCVSS 7.5/10EPSS 8.04%
Last modified
CVE-2019-19906 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 8.04% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cyrusimap | Cyrus-Sasl | < 2.1.28 |
| Debian | Debian Linux | 8.0 |
| Debian | Debian Linux | 9.0 |
| Debian | Debian Linux | 10.0 |
| Canonical | Ubuntu Linux | 12.04 |
| Canonical | Ubuntu Linux | 14.04 |
| Canonical | Ubuntu Linux | 16.04 |
| Canonical | Ubuntu Linux | 18.04 |
| Canonical | Ubuntu Linux | 19.10 |
| Fedoraproject | Fedora | 31 |
| Fedoraproject | Fedora | 32 |
| Redhat | Jboss Enterprise Web Server | 2.0.0 |
| Apple | Mac Os X | 10.14.6 |
| Redhat | Enterprise Linux | 5.0 |
| Redhat | Enterprise Linux | 6.0 |
| Redhat | Enterprise Linux | 7.0 |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux Eus | 8.4 |
| Redhat | Enterprise Linux For Ibm Z Systems | 8.0 |
| Redhat | Enterprise Linux For Ibm Z Systems Eus | 8.4 |
| Redhat | Enterprise Linux For Power Little Endian | 8.0 |
| Redhat | Enterprise Linux For Power Little Endian Eus | 8.4 |
| Redhat | Enterprise Linux Server Aus | 8.4 |
| Redhat | Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions | 8.4 |
| Redhat | Enterprise Linux Server Tus | 8.4 |
| Redhat | Enterprise Linux Server Update Services For Sap Solutions | 8.4 |
| Apple | Ipados | 13.6 |
| Apple | Iphone Os | 13.6 |
| Apple | Mac Os X | < 10.13.6 |
| Apple | Mac Os X | >= 10.13.0, < 10.13.6 |
| Apple | Mac Os X | >= 10.15.0, < 10.15.6 |
| Apple | Mac Os X | 10.13.6 |
| Apache | Bookkeeper | 4.12.1 |
References
- http://seclists.org/fulldisclosure/2020/Jul/23Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2020/Jul/24Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/02/23/4Mailing List, Patch, Release Notes, Third Party Advisory
- https://github.com/cyrusimap/cyrus-sasl/issues/587Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/12/msg00027.htmlMailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Dec/42Mailing List, Third Party Advisory
- https://support.apple.com/kb/HT211288Third Party Advisory
- https://support.apple.com/kb/HT211289Third Party Advisory
- https://usn.ubuntu.com/4256-1/Patch, Third Party Advisory
- https://www.debian.org/security/2019/dsa-4591Third Party Advisory
- https://www.openldap.org/its/index.cgi/Incoming?id=9123Exploit, Third Party Advisory
- http://seclists.org/fulldisclosure/2020/Jul/23Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2020/Jul/24Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/02/23/4Mailing List, Patch, Release Notes, Third Party Advisory
- https://github.com/cyrusimap/cyrus-sasl/issues/587Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/12/msg00027.htmlMailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Dec/42Mailing List, Third Party Advisory
- https://support.apple.com/kb/HT211288Third Party Advisory
- https://support.apple.com/kb/HT211289Third Party Advisory
- https://usn.ubuntu.com/4256-1/Patch, Third Party Advisory
- https://www.debian.org/security/2019/dsa-4591Third Party Advisory
- https://www.openldap.org/its/index.cgi/Incoming?id=9123Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2019-19906?
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.
How severe is CVE-2019-19906?
CVE-2019-19906 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 8.04% probability of exploitation in the next 30 days.
How do I fix CVE-2019-19906?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2019-19906?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST