Denial of service in Snort HTTP decoder



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2025-20360
CWE-ID CWE-805
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Snort
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor Sourcefire

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Buffer Access with Incorrect Length Value

EUVDB-ID: #VU117302

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-2025-20360

CWE-ID: CWE-805 - Buffer Access with Incorrect Length Value

Exploit availability: No

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 - 3.9.0.0

CPE2.3 External links

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


Q & A

Can this vulnerability be exploited remotely?

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

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.

Is there known malware, which exploits this vulnerability?

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



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