Published: 15/04/2020 Updated: 09/02/2021

CVSS v2 Base Score: 7.5 | Impact Score: 6.4 | Exploitability Score: 10

CVSS v3 Base Score: 9.8 | Impact Score: 5.9 | Exploitability Score: 3.9

VMScore: 668

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

An issue exists in Squid up to and including 4.7. When handling requests from users, Squid checks its rules to see if the request should be denied. Squid by default comes with rules to block access to the Cache Manager, which serves detailed server information meant for the maintainer. This rule is implemented via url_regex. The handler for url_regex rules URL decodes an incoming request. This allows an malicious user to encode their URL to bypass the url_regex check, and gain access to the blocked resource.

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squid-cache squid
debian debian linux 9.0
debian debian linux 10.0
canonical ubuntu linux 16.04
canonical ubuntu linux 18.04

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 ...

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 through 47 and 5 When receiving a request, Squid checks its cache to see if it can serve up a response It does this by making a MD5 hash of the absolute URL of the request If found, it servers the request The absolute URL can include the decoded UserInfo (username and password) for certain protocols This decod ...

Due to a buffer overflow bug Squid is vulnerable to a Denial of Service attack against HTTP Digest Authentication An issue was discovered in Squid through 47 When handling requests from users, Squid checks its rules to see if the request should be denied Squid by default comes with rules to block access to the Cache Manager, which serves detaile ...

An issue was discovered in Squid through 47 and 5 When receiving a request, Squid checks its cache to see if it can serve up a response It does this by making a MD5 hash of the absolute URL of the request If found, it servers the request The absolute URL can include the decoded UserInfo (username and password) for certain protocols This decod ...

CWE-306 https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12524.txt 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://security.netapp.com/advisory/ntap-20210205-0006/https://access.redhat.com/errata/RHSA-2020:4743 https://nvd.nist.gov https://www.debian.org/security/2020/dsa-4682

CVE-2019-12524

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