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CVE-2018-16855

HIGHCVSS 7.5/10EPSS 59.47%

Last modified

CVE-2018-16855 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 59.47% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.0
7.5/10

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
59.47%

99.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
PowerdnsRecursor< 4.1.8

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2018-16855?
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.
How severe is CVE-2018-16855?
CVE-2018-16855 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 59.47% probability of exploitation in the next 30 days.
How do I fix CVE-2018-16855?
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.

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Source: NVD / NIST