Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
None
Attack Vector
Network
0

CVE-2020-11945

Disclosure Date: April 23, 2020
Add MITRE ATT&CK tactics and techniques that apply to this CVE.
Initial Access
Techniques
Validation
Validated
Validated
Validated
Validated
Validated

Description

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).

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CVSS V3 Severity and Metrics
Base Score:
9.8 Critical
Impact Score:
5.9
Exploitability Score:
3.9
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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):
High

General Information

Vendors

  • canonical,
  • debian,
  • fedoraproject,
  • opensuse,
  • squid-cache

Products

  • debian linux 10.0,
  • debian linux 9.0,
  • fedora 30,
  • fedora 31,
  • fedora 32,
  • leap 15.1,
  • squid,
  • ubuntu linux 16.04,
  • ubuntu linux 18.04,
  • ubuntu linux 19.10,
  • ubuntu linux 20.04

References

Advisory

Additional Info

Technical Analysis