#VU23339 Use-after-free in GoAhead - CVE-2019-5096

Vulnerability identifier: #VU23339

Vulnerability risk: High

CVSSv4.0: 8.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2019-5096

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
GoAhead
Server applications / Web servers

Vendor: EmbedThis

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing a multi-part/form-data HTTP request with multiple Content-Disposition headers in the same request. A remote attacker can send a specially crafted HTTP request, corrupt heap structures and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

GoAhead: 3.6.5 - 5.0.1

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External links
https://www.talosintelligence.com/vulnerability_reports/TALOS-2019-0888

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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. However, proof of concept for this vulnerability is available.