Ubuntu update for squid

Published: 2021-03-29

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-15049 CVE-2020-25097
CWE-ID	CWE-444
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Ubuntu Operating systems & Components / Operating system squid (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Inconsistent interpretation of HTTP requests

EUVDB-ID: #VU29391

Risk: Medium

CVSSv4.0: 0.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-15049

CWE-ID: CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform cache poisoning attack.

The vulnerability exists in the way Squid processes client's requests. A remote client can send specially crafted data in the request to perform request smuggling and poison the HTTP cache contents with crafted HTTP(S) request messages.

Successful exploitation of the vulnerability requires an upstream server to participate in the smuggling and generate the poison response sequence.

Mitigation

Update the affected package squid to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.10

squid (Ubuntu package): before 3.5.12-1ubuntu7.16

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4895-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Inconsistent interpretation of HTTP requests

EUVDB-ID: #VU51248