CVE-2019-12523
moderate-risk
Published 2019-11-26
An issue was discovered in Squid before 4.9. 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, e.g., an attacker can connect to HTTP servers that only listen on localhost.
Do I need to act?
-
0.56% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.1/10
Critical
NETWORK
/ LOW complexity
Affected Products (11)
Affected Vendors
References (18)
Third Party Advisory
http://www.squid-cache.org/Advisories/SQUID-2019_8.txt
Issue Tracking
https://bugzilla.suse.com/show_bug.cgi?id=1156329
Third Party Advisory
https://usn.ubuntu.com/4213-1/
Third Party Advisory
https://usn.ubuntu.com/4446-1/
Third Party Advisory
https://www.debian.org/security/2020/dsa-4682
Third Party Advisory
http://www.squid-cache.org/Advisories/SQUID-2019_8.txt
Issue Tracking
https://bugzilla.suse.com/show_bug.cgi?id=1156329
Third Party Advisory
https://usn.ubuntu.com/4213-1/
Third Party Advisory
https://usn.ubuntu.com/4446-1/
Third Party Advisory
https://www.debian.org/security/2020/dsa-4682
49
/ 100
moderate-risk
Severity
31/34 · Critical
Exploitability
2/34 · Minimal
Exposure
16/34 · Moderate