CVE-2019-18676
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Squid
PublishedNov 26, 2019
First seenNov 26, 2019
How to fix
Vendor advisories
- usn.ubuntu.com/4213-1/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UEMOYTMCCFWK5NOXSXEIH5D2VGWVXR67/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MTM74TU2BSLT5B3H4F3UDW53672NVLMC/
- debian.org/security/2020/dsa-4682
- usn.ubuntu.com/4446-1/
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| squid-cache squid | 3.0 ≤ v ≤ 3.5.28, 4.0 ≤ v ≤ 4.8 | — |
| canonical ubuntu_linux | 16.04, 18.04, 19.04, 19.10 | — |
| fedoraproject fedora | 30, 31 | — |
| debian debian_linux | 9.0, 10.0 | — |
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