SB2020040228 - Heap-based buffer overflow in haproxy (Alpine package)
Published: April 2, 2020
Security Bulletin ID
SB2020040228
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Heap-based buffer overflow (CVE-ID: CVE-2020-11100)
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.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=7ce71a261b936c5390c3a099f38bce164e895ce6
- https://git.alpinelinux.org/aports/commit/?id=63b8a5e4b9fad35855bfd733bf2f539cc223c6bc
- https://git.alpinelinux.org/aports/commit/?id=f0192cc6bdc460cd52ed9cdd8053b2ae3ea3996e
- https://git.alpinelinux.org/aports/commit/?id=f190b88576dab963785aeb53d8a36a515b08d0fd
- https://git.alpinelinux.org/aports/commit/?id=44acde30a7c08ba832c26de941be15cac2195143