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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NExploitability: 3.9 | Impact: 3.6Attack Vector: Network
Complexity: Low
Privileges: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None
Affected Packages3 packages
Also affects: Ubuntu Linux 16.04, 18.04, 18.10, Openshift Container Platform 3.11
🔴Vulnerability Details
4GHSAGHSA-5m22-hqfx-435p: An out-of-bounds read in dns_validate_dns_response in dns↗2022-05-14 OSVhaproxy vulnerabilities↗2019-01-15 CVEListCVE-2018-20102: An out-of-bounds read in dns_validate_dns_response in dns↗2018-12-12 OSVCVE-2018-20102: An out-of-bounds read in dns_validate_dns_response in dns↗2018-12-12 📋Vendor Advisories
3UbuntuHAProxy vulnerabilities↗2019-01-15 Red Hathaproxy: Out-of-bounds read in dns.c:dns_validate_dns_response() allows for memory disclosure↗2018-12-12 DebianCVE-2018-20102: haproxy - An out-of-bounds read in dns_validate_dns_response in dns.c was discovered in HA...↗2018 💬Community
2BugzillaCVE-2018-20102 haproxy: Out-of-bounds read in dns.c:dns_validate_dns_response() allows for memory disclosure↗2018-12-13 BugzillaCVE-2018-20102 haproxy: Out-of-bounds read in dns.c:dns_validate_dns_response() allows for memory disclosure [fedora-all]↗2018-12-13