Buffer over-read in HAProxy - CVE-2018-14645
Published: September 27, 2018
Vulnerability identifier: #VU14915
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-2018-14645
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 a boundary condition within the HPACK decoder in hpack_valid_idx() function. A remote attacker can send a specially specially crafted HTTP/2 request, trigger out-of-bounds read error and perform a denial of service attack.
Affected software
HAProxy
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power
Opensuse
Fedora
haproxy
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power
Opensuse
Fedora
haproxy
How to mitigate CVE-2018-14645
Install update from vendor's website.
HAProxy - update to 1.8.14
haproxy - addressed in versions 1.8.14-1.fc28, 1.8.14-1.fc29
haproxy - addressed in versions 1.8.14-1.fc28, 1.8.14-1.fc29