Published: 26/11/2019 Updated: 07/11/2023

CVSS v2 Base Score: 5 | Impact Score: 2.9 | Exploitability Score: 10

CVSS v3 Base Score: 7.5 | Impact Score: 3.6 | Exploitability Score: 3.9

VMScore: 445

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

An issue exists in Squid 3.x and 4.x up to and including 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.

Vulnerable Product	Search on Vulmon	Subscribe to Product
squid-cache squid
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

Synopsis Moderate: squid:4 security, bug fix, and enhancement update Type/Severity Security Advisory: Moderate Topic An update for the squid:4 module is now available for Red Hat Enterprise Linux 8Red Hat Product Security has rated this update as having a security impact of Moderate A Common Vulnerability ...

Several security issues were fixed in Squid ...

Multiple security issues were discovered in the Squid proxy caching server, which could result in the bypass of security filters, information disclosure, the execution of arbitrary code or denial of service For the stable distribution (buster), these problems have been fixed in version 46-1+deb10u2 We recommend that you upgrade your squid packag ...

An issue was discovered in Squid before 49 When handling a URN request, a corresponding HTTP request is made This HTTP request doesn't go through the access checks that incoming HTTP requests go through This causes all access checks to be bypassed and allows access to restricted HTTP servers, eg, an attacker can connect to HTTP servers that o ...

CWE-787 https://bugzilla.suse.com/show_bug.cgi?id=1156329 http://www.squid-cache.org/Versions/v4/changesets/squid-4-fbbdf75efd7a5cc244b4886a9d42ea458c5a3a73.patch http://www.squid-cache.org/Advisories/SQUID-2019_8.txt https://github.com/squid-cache/squid/pull/275 https://usn.ubuntu.com/4213-1/https://www.debian.org/security/2020/dsa-4682 https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html https://usn.ubuntu.com/4446-1/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UEMOYTMCCFWK5NOXSXEIH5D2VGWVXR67/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MTM74TU2BSLT5B3H4F3UDW53672NVLMC/https://access.redhat.com/errata/RHSA-2020:4743 https://usn.ubuntu.com/4213-1/https://nvd.nist.gov

CVE-2019-18676

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