VDB-93740 · CVE-2016-8672 · BID 94460

Siemens SIMATIC S7-400 Session Cookie siemens_ad_session httponly information disclosure

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Siemens SIMATIC CP 343-1, SIMATIC CP 443-1, SIMATIC S7-300 and SIMATIC S7-400. This impacts an unknown function of the component Session Cookie Handler. Such manipulation of the argument siemens_ad_session leads to information disclosure (httponly). This vulnerability is referenced as CVE-2016-8672. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Siemens SIMATIC CP 343-1, SIMATIC CP 443-1, SIMATIC S7-300 and SIMATIC S7-400 (SCADA Software) (the affected version unknown) and classified as critical. Affected by this issue is an unknown part of the component Session Cookie Handler. The manipulation of the argument siemens_ad_session with an unknown input leads to a information disclosure vulnerability (httponly). Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality.

The bug was discovered 11/21/2016. The weakness was published 11/21/2016 by Andrea Barisani as Web vulnerabilities in Siemens S7-300/S7-400/CP343-1/CP443-1 as confirmed mailinglist post (Bugtraq). The advisory is shared for download at seclists.org. This vulnerability is handled as CVE-2016-8672 since 10/15/2016. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/04/2022). The MITRE ATT&CK project declares the attack technique as T1592. The advisory points out:

The session cookie 'siemens_ad_session' is not protected by means of the Secure or HttpOnly flags. The Secure flag forces the transmission of a cookie only on HTTPS connections, its omission results in man-in-the-middle (MITM) attacks being capable of intercepting the cookie, by forcing its transmission on a plain HTTP connection triggered for its domain.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 94460†). Similar entry is available at VDB-93741. Once again VulDB remains the best source for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: httponly
Class: Information disclosure / httponly
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/15/2016 🔍
11/21/2016 +37 days 🔍
11/21/2016 +0 days 🔍
11/21/2016 +0 days 🔍
11/21/2016 +0 days 🔍
11/23/2016 +2 days 🔍
10/04/2022 +2141 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: Web vulnerabilities in Siemens S7-300/S7-400/CP343-1/CP443-1
Researcher: Andrea Barisani
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-8672 (🔍)
GCVE (CVE): GCVE-0-2016-8672
GCVE (VulDB): GCVE-100-93740
SecurityFocus: 94460 - Multiple Siemens Products Cross Site Request Forgery and Information Disclosure Vulnerabilities

See also: 🔍

Entryinfo

Created: 11/21/2016 21:01
Updated: 10/04/2022 10:17
Changes: 11/21/2016 21:01 (55), 06/05/2019 20:47 (13), 10/04/2022 10:17 (3)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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