DNS: PowerDNS Recursive Out of Bounds Read Denial of Service
This signature detects attempts to exploit a known vulnerability against PowerDNS. The vulnerability is due to improper processing of crafted DNS queries, leading to out-of-bounds read. A remote, unauthenticated attacker can exploit this vulnerability by sending a crafted query to the target server. A successful attack could lead to PowerDNS abnormally terminating, leading to a denial-of-service condition.
Extended Description
An issue has been found in PowerDNS Recursor before version 4.1.8 where a remote attacker sending a DNS query can trigger an out-of-bounds memory read while computing the hash of the query for a packet cache lookup, possibly leading to a crash.
Affected Products
Powerdns recursor
References
CVE: CVE-2018-16855
Short Name
DNS:POWERDNS-DOS-MA
Severity
Major
Recommended
True
Recommended Action
Drop
Category
DNS
Keywords
Bounds CVE-2018-16855 Denial Out PowerDNS Read Recursive Service of
Release Date
01/22/2019
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3337
False Positive
Unknown
Vendors
Powerdns
CVSS Score
5.0