Cisco Cyber Vision HTTP buffer under-read

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.8$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Cisco Cyber Vision, Secure Firewall Threat Defense Software and UTD SNORT IPS Engine Software. This issue affects some unknown processing of the component HTTP Handler. Such manipulation leads to buffer under-read. This vulnerability is documented as CVE-2025-20359. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Cisco Cyber Vision, Secure Firewall Threat Defense Software and UTD SNORT IPS Engine Software (version unknown). It has been rated as critical. Affected by this issue is an unknown function of the component HTTP Handler. The manipulation with an unknown input leads to a buffer under-read vulnerability. Using CWE to declare the problem leads to CWE-127. The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations prior to the targeted buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Multiple Cisco products are affected by a vulnerability in the Snort 3 HTTP Decoder that could allow an unauthenticated, remote attacker to cause the disclosure of possible sensitive data or cause the Snort 3 Detection Engine to crash. This vulnerability is due to an error in the logic of buffer handling when the MIME fields of the HTTP header are parsed. This can result in a buffer under-read. An attacker could exploit this vulnerability by sending crafted HTTP packets through an established connection that is parsed by Snort 3. A successful exploit could allow the attacker to induce one of two possible outcomes: the unexpected restarting of the Snort 3 Detection Engine, which could cause a denial of service (DoS) condition, or information disclosure of sensitive information in the Snort 3 data stream. Due to the under-read condition, it is possible that sensitive information that is not valid connection data could be returned.

The advisory is available at sec.cloudapps.cisco.com. This vulnerability is handled as CVE-2025-20359 since 10/10/2024. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/17/2025).

The vulnerability scanner Nessus provides a plugin with the ID 270579 (Multiple Cisco Products Snort 3 MIME DoS Vulnerabilities (cisco-sa-snort3-mime-vulns-tTL8PgVH_CVE-2025-20359)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (270579). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.8

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (cisco): 🔒

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer under-read
CWE: CWE-127 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 270579
Nessus Name: Multiple Cisco Products Snort 3 MIME DoS Vulnerabilities (cisco-sa-snort3-mime-vulns-tTL8PgVH_CVE-2025-20359)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/10/2024 CVE reserved
10/15/2025 +370 days Advisory disclosed
10/15/2025 +0 days VulDB entry created
10/17/2025 +2 days VulDB entry last update

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-snort3-mime-vulns-tTL8PgVH
Status: Confirmed

CVE: CVE-2025-20359 (🔒)
GCVE (CVE): GCVE-0-2025-20359
GCVE (VulDB): GCVE-100-328706

Entryinfo

Created: 10/15/2025 19:28
Updated: 10/17/2025 08:43
Changes: 10/15/2025 19:28 (63), 10/17/2025 08:43 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!