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Mend.io Vulnerability Database

CVE-2019-12523

Date: November 26, 2019

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.

Language: C++

Severity Score

9.1

Related Resources (16)

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MTM74TU2BSLT5B3H4F3UDW53672NVLMC/

Url: https://access.redhat.com/security/cve/CVE-2019-12523

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UEMOYTMCCFWK5NOXSXEIH5D2VGWVXR67/

Url: https://nvd.nist.gov/vuln/detail/CVE-2019-12523

Url: https://usn.ubuntu.com/4446-1/

Url: http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.html

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MTM74TU2BSLT5B3H4F3UDW53672NVLMC/

Url: https://www.debian.org/security/2020/dsa-4682

Url: https://bugzilla.suse.com/show_bug.cgi?id=1156329

Url: https://usn.ubuntu.com/4213-1/

Url: https://security-tracker.debian.org/tracker/CVE-2019-12523

Url: https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2019-12523

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UEMOYTMCCFWK5NOXSXEIH5D2VGWVXR67/

Url: http://www.squid-cache.org/Advisories/SQUID-2019_8.txt

Url: https://www.mend.io/vulnerability-database/CVE-2019-12523

Severity Score

9.1

Weakness Type (CWE)

Insufficient Information

NVD-CWE-noinfo

CVSS v3.1

Base Score:	9.1
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	HIGH
Integrity (I):	HIGH
Availability (A):	NONE

CVSS v2

Base Score:	6.4
Access Vector (AV):	NETWORK
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	PARTIAL
Integrity (I):	PARTIAL
Availability (A):	NONE
Additional information:

Mend.io Vulnerability Database

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CVE-2019-12523

Date: November 26, 2019

Language: C++

Severity Score

Related Resources (16)

Severity Score

Weakness Type (CWE)

CVSS v3.1

CVSS v2

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