Sophos Web Appliance up to 4.3.1.1 session fixiation

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.
6.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Sophos Web Appliance up to 4.3.1.1. This affects an unknown function. The manipulation leads to session fixiation. This vulnerability is uniquely identified as CVE-2017-6412. The attack is possible to be carried out remotely. Moreover, an exploit is present. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Sophos Web Appliance up to 4.3.1.1. It has been rated as critical. This issue affects an unknown functionality. The manipulation with an unknown input leads to a session fixiation vulnerability. Using CWE to declare the problem leads to CWE-384. Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In Sophos Web Appliance (SWA) before 4.3.1.2, Session Fixation could occur, aka NSWA-1310.

The bug was discovered 03/30/2017. The weakness was disclosed 03/30/2017 by Russell Sanford (Website). It is possible to read the advisory at wsa.sophos.com. The identification of this vulnerability is CVE-2017-6412 since 03/01/2017. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 99237 (Sophos Web Appliance < 4.3.1.2 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 87285 (Sophos Secure Web Appliance Multiple Vulnerabilities).

Upgrading to version 4.3.1.2 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (42012), Tenable (99237) and SecurityFocus (BID 97261†). The entries VDB-99104, VDB-99105 and VDB-99106 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.6

VulDB Base Score: 5.6
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔍

CVSSv2info

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Session fixiation
CWE: CWE-384
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 99237
Nessus Name: Sophos Web Appliance < 4.3.1.2 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Web Appliance 4.3.1.2

Timelineinfo

03/01/2017 🔍
03/16/2017 +15 days 🔍
03/30/2017 +14 days 🔍
03/30/2017 +0 days 🔍
03/30/2017 +0 days 🔍
03/31/2017 +1 days 🔍
03/31/2017 +0 days 🔍
04/06/2017 +6 days 🔍
11/09/2025 +3139 days 🔍

Sourcesinfo

Vendor: sophos.com

Advisory: wsa.sophos.com
Researcher: Russell Sanford
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-6412 (🔍)
GCVE (CVE): GCVE-0-2017-6412
GCVE (VulDB): GCVE-100-99107
SecurityFocus: 97261 - Sophos Web Appliance Multiple Command Injection and Session Fixation Vulnerabilities
OSVDB: - CVE-2017-6412 - Sophos Web Appliance - Session Fixation Issue

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 03/31/2017 10:46
Updated: 11/09/2025 05:09
Changes: 03/31/2017 10:46 (70), 08/24/2020 09:48 (10), 11/09/2025 05:09 (18)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to know what is going to be exploited?

We predict KEV entries!