What’s Vulnerable › Vulnerabilities
CVE-2018-20102
- Severity: high (CVSS 7.5 v3.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 4.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2018-12-12 · updated 2026-06-17
- Weakness: CWE-125
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.
Affected products
- Canonical Ubuntu Linux: 16.04, 18.04, 18.10
- HAProxy: through 1.8.14
- Red Hat OpenShift Container Platform 4.18: 3.11
References
- http://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=efbbdf72992cd20458259962346044cafd9331c0
- http://www.securityfocus.com/bid/106223
- https://access.redhat.com/errata/RHBA-2019:0326
- https://access.redhat.com/errata/RHBA-2019:0327
- https://access.redhat.com/errata/RHSA-2019:1436
- https://lists.debian.org/debian-lts-announce/2022/05/msg00045.html
- https://usn.ubuntu.com/3858-1/
- http://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=efbbdf72992cd20458259962346044cafd9331c0
- http://www.securityfocus.com/bid/106223
- https://access.redhat.com/errata/RHBA-2019:0326
- https://access.redhat.com/errata/RHBA-2019:0327
- https://access.redhat.com/errata/RHSA-2019:1436
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