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CVE-2018-20102

UnknownEPSS 4.35%

Last modified

CVE-2018-20102 is a vulnerability of currently unknown severity. An out-of-bounds read in dns_validate_dns_response in dns.c was discovered in HAProxy through 1.8.14. Due to a missing check when validating DNS responses, remote attackers might be able read the 16 bytes corresponding to an AAAA record from the non-initialized part of the buffer, possibly accessing anything that was left on the stack, or even past the end of the 8193-byte buffer, depending on the value of accepted_payload_size.. EPSS estimates a 4.35% chance of exploitation in the next 30 days.

Description

An out-of-bounds read in dns_validate_dns_response in dns.c was discovered in HAProxy through 1.8.14. Due to a missing check when validating DNS responses, remote attackers might be able read the 16 bytes corresponding to an AAAA record from the non-initialized part of the buffer, possibly accessing anything that was left on the stack, or even past the end of the 8193-byte buffer, depending on the value of accepted_payload_size.

Metrics

EPSS Probability
4.35%

90.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
HaproxyHaproxy<= 1.8.14
CanonicalUbuntu Linux16.04
CanonicalUbuntu Linux18.04
CanonicalUbuntu Linux18.10
RedhatOpenshift Container Platform3.11

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2018-20102?
An out-of-bounds read in dns_validate_dns_response in dns.c was discovered in HAProxy through 1.8.14. Due to a missing check when validating DNS responses, remote attackers might be able read the 16 bytes corresponding to an AAAA record from the non-initialized part of the buffer, possibly accessing anything that was left on the stack, or even past the end of the 8193-byte buffer, depending on the value of accepted_payload_size.
How severe is CVE-2018-20102?
Severity scoring for CVE-2018-20102 is pending analysis. The EPSS model estimates a 4.35% probability of exploitation in the next 30 days.
How do I fix CVE-2018-20102?
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.

Are you affected by CVE-2018-20102?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST