#VU25019 Out-of-bounds read in Squid - CVE-2019-12528

Vulnerability identifier: #VU25019

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-12528

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Squid
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Squid-cache.org

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when translating FTP server listing into HTTP responses. A remote attacker can trick the victim into vising a specially crafted FTP server, trigger out-of-bounds read and gain access to memory contents of the heap.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Squid: 2.0.release - 2.0.patch2, 2.1.release - 2.1.pre4, 2.2.stable1 - 2.2.pre2, 2.3.stable1 - 2.3.devel3, 2.4.stable1 - 2.4_9, 2.5.stable1 - 2.5.9, 2.6.stable1 - 2.6.stable6, 2.7.stable1 - 2.7.STABLE9, 3.0.stable1 - 3.5.28, 4.0.1 - 4.9

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External links
https://www.squid-cache.org/Advisories/SQUID-2020_2.txt

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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