Heap-based buffer overflow in HAProxy - CVE-2020-11100
Published: April 2, 2020
Vulnerability identifier: #VU26549
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2020-11100
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: HAProxy
Affected software:
HAProxy
HAProxy
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing HTTP/2 requests within the hpack_dht_insert() function in hpack-tbl.c (HPACK decoder). A remote attacker can send a specially crafted HTTP/2 request to the affected HAProxy, trigger heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2020-11100
Install updates from vendor's website.
Sources
- http://www.haproxy.org
- https://bugzilla.redhat.com/show_bug.cgi?id=1819111
- https://git.haproxy.org/?p=haproxy.git;a=commit;h=5dfc5d5cd0d2128d77253ead3acf03a421ab5b88
- https://lists.debian.org/debian-security-announce/2020/msg00052.html
- https://www.haproxy.org/download/2.1/src/CHANGELOG
- https://www.mail-archive.com/haproxy@formilux.org/msg36876.html