#VU117301 Buffer under-read in Snort - CVE-2025-20359

Vulnerability identifier: #VU117301

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-2025-20359

CWE-ID: CWE-127

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 a boundary error within the HTTP decoder when handling MIME fields. A remote attacker can send specially crafted HTTP packets through the channel that is monitored by the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Snort: 3.1.0.0 - 3.9.3.0

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-mime-vulns-tTL8PgVH

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?