CVE-2021-41611

2021-10-1800:00:00

ubuntu.com

squid

5.0.6

5.1.x

remote servers

security trust

certificates

unsafe services

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

0.001

Percentile

50.0%

JSON

An issue was discovered in Squid 5.0.6 through 5.1.x before 5.2. When
validating an origin server or peer certificate, Squid may incorrectly
classify certain certificates as trusted. This problem allows a remote
server to obtain security trust well improperly. This indication of trust
may be passed along to clients, allowing access to unsafe or hijacked
services.