SB2017121529 - Memory leak in pdns-recursor (Alpine package)
Published: December 15, 2017
Security Bulletin ID
SB2017121529
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Memory leak (CVE-ID: CVE-2017-15094)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists due to a flaw in the DNSSEC parsing code of PowerDNS Recursor during a code audit by Nixu. A remote attacker can supply specially crafted DNSSEC ECDSA keys, parse it when validation is enabled by setting dnssec to a value other than off or process-no-validate (default), trigger memory leak and cause the service to crash.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=c9348fdd367c1a3bd5601701acba7353ae984c3a
- https://git.alpinelinux.org/aports/commit/?id=f2ae078758a3a6a9ba1068bf9d79123f305d54f8
- https://git.alpinelinux.org/aports/commit/?id=cc8761a9a2849c5e5a49af8667dbea9a2aeb990d
- https://git.alpinelinux.org/aports/commit/?id=0821b9aa215845c51715531d9478f41a9322f98c