Out-of-Bounds Exception in PowerDNS Authoritative Server Affects Multiple Versions
CVE-2021-36754

7.5HIGH

Key Information:

Vendor
Powerdns
Status
Authoritative Server
Vendor
CVE Published:
30 July 2021

Summary

A flaw exists in PowerDNS Authoritative Server versions 4.5.0 and earlier, allowing remote attackers to crash the service. This vulnerability is triggered when an attacker sends a specific query (QTYPE 65535), leading to an out-of-bounds exception. Successful exploitation can disrupt service availability for legitimate users.

References

https://doc.powerdns.com/authoritative/security-advisorie...
x_refsource_MISC
http://www.openwall.com/lists/oss-security/2021/07/26/2
mailing-listx_refsource_MLIST
https://doc.powerdns.com/authoritative/security-advisorie...
x_refsource_CONFIRM

EPSS Score

20% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.