SB2019122416 - Out-of-bounds write in cyrus-sasl (Alpine package)
Published: December 24, 2019 Updated: February 8, 2022
Security Bulletin ID
SB2019122416
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2019-19906)
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.
References
- https://git.alpinelinux.org/aports/commit/?id=0595a8cfd177012e492000c76033a8a089b51270
- https://git.alpinelinux.org/aports/commit/?id=320e9fe25de21594bb1ef20b31586ec775ab1758
- https://git.alpinelinux.org/aports/commit/?id=336ed678178032d07a97fee172237315410e8d3c
- https://git.alpinelinux.org/aports/commit/?id=ae0d0538a6d887aa919e257b5d2e386000418efa
- https://git.alpinelinux.org/aports/commit/?id=e20d740be6dacfa112b97d79489bcf960eb2c7f8