Vulnerability Details : CVE-2020-11945

An issue was discovered in Squid before 5.0.2. A remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This occurs because the attacker can overflow the nonce reference counter (a short integer). Remote code execution may occur if the pooled token credentials are freed (instead of replayed as valid credentials).
Publish Date : 2020-04-23 Last Update Date : 2021-03-17

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- CVSS Scores & Vulnerability Types

CVSS Score	7.5
Confidentiality Impact	Partial (There is considerable informational disclosure.)
Integrity Impact	Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact	Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity	Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication	Not required (Authentication is not required to exploit the vulnerability.)
Gained Access	None
Vulnerability Type(s)	Execute CodeOverflow
CWE ID	190

- Related OVAL Definitions

Title	Definition Id	Class	Family
RHSA-2020:2040: squid security update (Important)	oval:com.redhat.rhsa:def:20202040		unix
RHSA-2020:2041: squid:4 security update (Important)	oval:com.redhat.rhsa:def:20202041		unix

OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2020-11945

#	Product Type	Vendor	Product	Version	Update	Edition	Language
1	OS	Canonical	Ubuntu Linux	16.04	*	*	*	Version Details Vulnerabilities
2	OS	Canonical	Ubuntu Linux	18.04	*	*	*	Version Details Vulnerabilities
3	OS	Canonical	Ubuntu Linux	19.10	*	*	*	Version Details Vulnerabilities
4	OS	Canonical	Ubuntu Linux	20.04	*	*	*	Version Details Vulnerabilities
5	OS	Debian	Debian Linux	9.0	*	*	*	Version Details Vulnerabilities
6	OS	Debian	Debian Linux	10.0	*	*	*	Version Details Vulnerabilities
7	OS	Fedoraproject	Fedora	30	*	*	*	Version Details Vulnerabilities
8	OS	Fedoraproject	Fedora	31	*	*	*	Version Details Vulnerabilities
9	OS	Fedoraproject	Fedora	32	*	*	*	Version Details Vulnerabilities
10	OS	Opensuse	Leap	15.1	*	*	*	Version Details Vulnerabilities
11	Application	Squid-cache	Squid	*	*	*	*	Version Details Vulnerabilities