Out-of-bounds read in HAProxy - CVE-2018-20615
Published: January 22, 2019
Vulnerability identifier: #VU17107
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-20615
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to incorrect frame length validation when processing headers with priority flags set. A remote attacker can send a specially crafted HTTP/2 request, trigger our-of-bounds read and crash the affected application.
Affected software
HAProxy
haproxy (Ubuntu package)
rh-haproxy18-haproxy (Red Hat package)
Red Hat OpenShift Container Platform
Opensuse
haproxy (Ubuntu package)
rh-haproxy18-haproxy (Red Hat package)
Red Hat OpenShift Container Platform
Opensuse
How to mitigate CVE-2018-20615
Install updates from vendor's website.
HAProxy - update to 1.8.17
haproxy (Ubuntu package) - addressed in versions 1.6.3-1ubuntu0.2, 1.8.8-1ubuntu0.3, 1.8.13-2ubuntu0.1
rh-haproxy18-haproxy (Red Hat package) - update to 1.8.4-4.el7
haproxy (Ubuntu package) - addressed in versions 1.6.3-1ubuntu0.2, 1.8.8-1ubuntu0.3, 1.8.13-2ubuntu0.1
rh-haproxy18-haproxy (Red Hat package) - update to 1.8.4-4.el7