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ubuntucveUbuntu.comUB:CVE-2021-28662
HistoryMay 27, 2021 - 12:00 a.m.

CVE-2021-28662

2021-05-2700:00:00
ubuntu.com
ubuntu.com
16
squid
denial of service
cve-2021-28662
http
https
remote server

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.176

Percentile

96.2%

An issue was discovered in Squid 4.x before 4.15 and 5.x before 5.0.6. If a
remote server sends a certain response header over HTTP or HTTPS, there is
a denial of service. This header can plausibly occur in benign network
traffic.

Bugs

Notes

Author Note
mdeslaur per upstream, all Squid older than 4.0 are not vulnerable.
OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchsquid< 4.10-1ubuntu1.4UNKNOWN
ubuntu20.10noarchsquid< 4.13-1ubuntu2.2UNKNOWN
ubuntu21.04noarchsquid< 4.13-1ubuntu4.1UNKNOWN
ubuntu21.10noarchsquid< 4.13-10ubuntu1UNKNOWN
ubuntu22.04noarchsquid< 4.13-10ubuntu1UNKNOWN

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.176

Percentile

96.2%