Multiple vulnerabilities in Squid



Published: 2023-10-24 | Updated: 2023-11-08
Risk Medium
Patch available YES
Number of vulnerabilities 5
CVE-ID CVE-2023-46847
CVE-2023-5824
CVE-2023-46846
CVE-2023-46848
CVE-2023-46724
CWE-ID CWE-119
CWE-237
CWE-444
CWE-20
CWE-295
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Squid
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor Squid-cache.org

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) Buffer overflow

EUVDB-ID: #VU82313

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-46847

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in HTTP Digest Authentication. A remote attacker can trigger memory corruption and cause a denial of service condition on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Squid: 3.2.0.1 - 6.3

External links

http://github.com/squid-cache/squid/security/advisories/GHSA-phqj-m8gv-cq4g


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

2) Improper Handling of Structural Elements

EUVDB-ID: #VU82316

Risk: Medium

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-5824

CWE-ID: CWE-237 - Improper Handling of Structural Elements

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper handling of structural elements in HTTP response caching. A remote user can cause a denial of service condition on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Squid: 2.0 - 12.3

External links

http://github.com/squid-cache/squid/security/advisories/GHSA-543m-w2m2-g255


Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

3) Inconsistent interpretation of HTTP requests

EUVDB-ID: #VU82315

Risk: Medium

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-46846

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform HTTP request smuggling attacks.

The vulnerability exists due to improper validation of HTTP requests when parsing HTTP/1.1 and ICAP messages. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.

Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Squid: 2.6 - 6.3

External links

http://github.com/squid-cache/squid/security/advisories/GHSA-j83v-w3p4-5cqh


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

4) Input validation error

EUVDB-ID: #VU82907

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-46848

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send ftp:// URLs in HTTP Request messages or construct ftp:// URLs from FTP Native input and crash the proxy server.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Squid: 5.0.3 - 6.3

External links

http://github.com/squid-cache/squid/security/advisories/GHSA-2g3c-pg7q-g59w


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

5) Improper Certificate Validation

EUVDB-ID: #VU82906

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-46724

CWE-ID: CWE-295 - Improper Certificate Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation when processing a specially crafted SSL Certificate in a server certificate chain. A remote attacker can initiate a TLS Handshake with a specially crafted SSL certificate and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Squid: 3.3 - 6.3

External links

http://github.com/squid-cache/squid/security/advisories/GHSA-73m6-jm96-c6r3
http://www.squid-cache.org/Versions/v6/SQUID-2023_4.patch
http://www.squid-cache.org/Versions/v5/SQUID-2023_4.patch
http://github.com/squid-cache/squid/commit/b70f864940225dfe69f9f653f948e787f99c3810


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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



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