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).
Published 2020-04-23 15:15:14
Updated 2021-03-17 12:40:42
Source MITRE
View at NVD,   CVE.org
Vulnerability category: OverflowExecute code

Threat overview for CVE-2020-11945

Top countries where our scanners detected CVE-2020-11945
Top open port discovered on systems with this issue 3128
IPs affected by CVE-2020-11945 2,240,254
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2020-11945!
*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-2020-11945

Probability of exploitation activity in the next 30 days: 12.66%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 95 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2020-11945

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Source
7.5
HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P
10.0
6.4
nvd@nist.gov
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
nvd@nist.gov

CWE ids for CVE-2020-11945

  • The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-11945

Products affected by CVE-2020-11945

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