Double free in Squid



Risk Low
Patch available NO
Number of vulnerabilities 1
CVE-ID N/A
CWE-ID CWE-415
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Squid
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor Squid-cache.org

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Double Free

EUVDB-ID: #VU50972

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: N/A

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error when processing "acl" directove. A local user with ability to supply a custom ACL rule for the first and second addresses can trigger a double free error and crash the service or execute arbitrary code with elevated privileges.


Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Squid: 4.0 - 5.0.5

CPE2.3 External links

https://seclists.org/fulldisclosure/2021/Feb/80


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

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.

The attacker would have to login to the system and perform certain actions 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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