Integer overflow in Varnish Cache - CVE-2017-12425
Published: September 4, 2019
Vulnerability identifier: #VU20865
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-12425
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform denial of service attack.
The vulnerability exists due to integer overflow when processing HTTP requests. A remote attacker can send a specially crafted HTTP request, trigger integer overflow and restart the caching server.
Successful exploitation of this vulnerability may allow an attacker to perform denial if service (DoS) attack.
Affected software
Varnish Cache
Arch Linux
Fedora
varnish (Alpine package)
varnish
Arch Linux
Fedora
varnish (Alpine package)
varnish
How to mitigate CVE-2017-12425
Install updates from vendor's website.
Varnish Cache - addressed in versions 4.0.5, 4.1.8, 5.1.3
varnish (Alpine package) - update to 4.1.2-r2
varnish - addressed in versions 4.0.5-1.el7, 4.1.8-1.fc24, 5.0.0-4.fc25, 5.1.3-2.fc26
varnish (Alpine package) - update to 4.1.2-r2
varnish - addressed in versions 4.0.5-1.el7, 4.1.8-1.fc24, 5.0.0-4.fc25, 5.1.3-2.fc26