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CVE-2018-20615

Published: 31 December 2018

An out-of-bounds read issue was discovered in the HTTP/2 protocol decoder in HAProxy 1.8.x and 1.9.x through 1.9.0 which can result in a crash. The processing of the PRIORITY flag in a HEADERS frame requires 5 extra bytes, and while these bytes are skipped, the total frame length was not re-checked to make sure they were present in the frame.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
haproxy
Launchpad, Ubuntu, Debian
upstream
Released (1.8.16-2)
trusty Does not exist
(trusty was not-affected [code not present])
xenial Not vulnerable
(code not present)
bionic
Released (1.8.8-1ubuntu0.3)
cosmic
Released (1.8.13-2ubuntu0.1)
Patches:
upstream: https://github.com/haproxy/haproxy/commit/a01f45e3ced23c799f6e78b5efdbd32198a75354

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H