CVE-2019-18676: Buffer Overflow
An issue was discovered in Squid 3.x and 4.x through 4.8. Due to incorrect input validation, there is a heap-based buffer overflow that can result in Denial of Service to all clients using the proxy. Severity is high due to this vulnerability occurring before normal security checks; any remote client that can reach the proxy port can trivially perform the attack via a crafted URI scheme.
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is CVE-2019-18676?
CVE-2019-18676 is an issue discovered in Squid 3.x and 4.x through 4.8, which results in a heap-based buffer overflow that can lead to Denial of Service attacks.
How severe is CVE-2019-18676?
CVE-2019-18676 has a severity rating of 7.5 (high).
How does CVE-2019-18676 impact Squid users?
CVE-2019-18676 can cause Denial of Service for all clients using the Squid proxy.
Which versions of Squid are affected by CVE-2019-18676?
Squid versions 3.x and 4.x through 4.8 are affected by CVE-2019-18676.
Where can I find more information about CVE-2019-18676?
You can find more information about CVE-2019-18676 in the Squid advisory and patches, as well as the Bugzilla entry.