#VU59963 Integer overflow in Snort - CVE-2022-20685

Vulnerability identifier: #VU59963

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-20685

CWE-ID: CWE-190

Exploitation vector: Network

Exploit availability: No

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

Vendor: Sourcefire

Description

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

The vulnerability exists due to integer overflow in the Modbus preprocessor. A remote attacker can send specially crafted traffic through an affected system, trigger integer overflow and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Snort: 2.9.0 - 3.1.10.0

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-dos-9D3hJLuj

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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.