First published: Tue Nov 26 2019(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
Affected Software | Affected Version | How to fix |
---|---|---|
Squid-Cache Squid | >=3.0<=3.5.28 | |
Squid-Cache Squid | >=4.0<=4.8 | |
Canonical Ubuntu Linux | =16.04 | |
Canonical Ubuntu Linux | =18.04 | |
Canonical Ubuntu Linux | =19.04 | |
Canonical Ubuntu Linux | =19.10 | |
Fedoraproject Fedora | =30 | |
Fedoraproject Fedora | =31 | |
Debian Debian Linux | =9.0 | |
Debian Debian Linux | =10.0 | |
Canonical Ubuntu Linux | =16.04 | |
ubuntu/squid | <4.9-2ubuntu1 | 4.9-2ubuntu1 |
ubuntu/squid | <4.9-2ubuntu1 | 4.9-2ubuntu1 |
ubuntu/squid | <4.4-1ubuntu2.3 | 4.4-1ubuntu2.3 |
ubuntu/squid | <4.8-1ubuntu2.1 | 4.8-1ubuntu2.1 |
ubuntu/squid | <4.9-2ubuntu1 | 4.9-2ubuntu1 |
ubuntu/squid | <4.9-1 | 4.9-1 |
ubuntu/squid3 | <3.5.27-1ubuntu1.7 | 3.5.27-1ubuntu1.7 |
ubuntu/squid3 | <3.5.12-1ubuntu7.12 | 3.5.12-1ubuntu7.12 |
debian/squid | 4.6-1+deb10u7 4.6-1+deb10u10 4.13-10+deb11u2 4.13-10+deb11u3 5.7-2 5.7-2+deb12u1 6.6-1 6.9-1 |
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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.
CVE-2019-18676 has a severity rating of 7.5 (high).
CVE-2019-18676 can cause Denial of Service for all clients using the Squid proxy.
Squid versions 3.x and 4.x through 4.8 are affected by CVE-2019-18676.
You can find more information about CVE-2019-18676 in the Squid advisory and patches, as well as the Bugzilla entry.