An issue was discovered in Squid through 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 attacker to encode their URL to bypass the url_regex check, and gain access to the blocked resource.
Published 2020-04-15 19:15:13
Updated 2021-02-09 16:55:39
Source MITRE
View at NVD,   CVE.org

Threat overview for CVE-2019-12524

Top countries where our scanners detected CVE-2019-12524
Top open port discovered on systems with this issue 3128
IPs affected by CVE-2019-12524 1,204,070
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2019-12524!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2019-12524

1.11%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 84 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2019-12524

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.5
HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P
10.0
6.4
NIST
9.8
CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.9
5.9
NIST

CWE ids for CVE-2019-12524

References for CVE-2019-12524

Products affected by CVE-2019-12524

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