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CVE-2018-10184

Status Candidate

Overview

An issue was discovered in HAProxy before 1.8.8. The incoming H2 frame length was checked against the max_frame_size setting instead of being checked against the bufsize. The max_frame_size only applies to outgoing traffic and not to incoming, so if a large enough frame size is advertised in the SETTINGS frame, a wrapped frame will be defragmented into a temporary allocated buffer where the second fragment may overflow the heap by up to 16 kB. It is very unlikely that this can be exploited for code execution given that buffers are very short lived and their addresses not realistically predictable in production, but the likelihood of an immediate crash is absolutely certain.

Related Files

Red Hat Security Advisory 2018-1372-01
Posted May 15, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-1372-01 - HAProxy is a TCP/HTTP reverse proxy which is particularly suited for high availability environments. Issues addressed include buffer overflow and denial of service vulnerabilities.

tags | advisory, web, denial of service, overflow, tcp, vulnerability
systems | linux, redhat
advisories | CVE-2018-10184
MD5 | 73567ccdb0af5ca9e37e65140bbb02e5
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