Multiple vulnerabilities in SQUID
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2020-15810 CVE-2020-15811 |
| CWE-ID | CWE-444 CWE-113 |
| 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 2 vulnerabilities.
1) Inconsistent interpretation of HTTP requests
EUVDB-ID: #VU46117
Risk: Medium
CVSSv3.1: 5.6 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-15810
CWE-ID:
CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to preform HTTP request smuggling attacks.
The vulnerability exists due to improper validation of HTTP requests. A remote authenticated 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsSquid: 2.5.6 - 5.0.3
External linkshttp://github.com/squid-cache/squid/security/advisories/GHSA-3365-q9qx-f98m/
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.
2) HTTP response splitting
EUVDB-ID: #VU46118
Risk: Medium
CVSSv3.1: 5.6 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-15811
CWE-ID:
CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform HTTP splitting attacks.
The vulnerability exists due to software does not corrector process CRLF character sequences. A remote authenticated attacker can send specially crafted request containing CRLF sequence and make the application to send a split HTTP response.
Successful exploitation of the vulnerability may allow an attacker perform cache poisoning attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsSquid: 2.7 RC2 - 5.0.3
External linkshttp://github.com/squid-cache/squid/security/advisories/GHSA-c7p8-xqhm-49wv/
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.
