Crypto++ up to 5.6.3 ProcessAndXorBlock information disclosure

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 (≈)
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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.
6.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Crypto++ up to 5.6.3. The impacted element is the function Rijndael::Enc::ProcessAndXorBlock/Rijndael::Dec::ProcessAndXorBlock. The manipulation results in information disclosure. This vulnerability is known as CVE-2016-3995. It is possible to launch the attack remotely. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Crypto++ up to 5.6.3. Affected is the function Rijndael::Enc::ProcessAndXorBlock/Rijndael::Dec::ProcessAndXorBlock. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The timing attack protection in Rijndael::Enc::ProcessAndXorBlock and Rijndael::Dec::ProcessAndXorBlock in Crypto++ (aka cryptopp) before 5.6.4 may be optimized out by the compiler, which allows attackers to conduct timing attacks.

The bug was discovered 04/10/2016. The weakness was published 02/13/2017 (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is traded as CVE-2016-3995 since 04/10/2016. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 90657 (Fedora 24 : cryptopp-5.6.3-3.fc24 (2016-96b60bdb96)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l.

Upgrading to version 5.6.4 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (90657) and SecurityFocus (BID 85975†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
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

Class: Information disclosure
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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Nessus ID: 90657
Nessus Name: Fedora 24 : cryptopp-5.6.3-3.fc24 (2016-96b60bdb96)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 880823
OpenVAS Name: Mageia Linux Local Check: mgasa-2016-0147
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Crypto++ 5.6.4

Timelineinfo

04/10/2016 🔍
04/10/2016 +0 days 🔍
04/11/2016 +1 days 🔍
04/14/2016 +3 days 🔍
04/22/2016 +8 days 🔍
02/13/2017 +297 days 🔍
02/13/2017 +0 days 🔍
02/14/2017 +1 days 🔍
11/14/2022 +2099 days 🔍

Sourcesinfo

Advisory: FEDORA-2016-96b60bdb96
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-3995 (🔍)
GCVE (CVE): GCVE-0-2016-3995
GCVE (VulDB): GCVE-100-96840
SecurityFocus: 85975 - Crypto++ CVE-2016-3995 Information Disclosure Vulnerability
OSVDB: - CVE-2016-3995 - Crypto++ - Timing Issue

Entryinfo

Created: 02/14/2017 09:05
Updated: 11/14/2022 08:26
Changes: 02/14/2017 09:05 (77), 11/14/2022 08:22 (4), 11/14/2022 08:26 (1)
Complete: 🔍
Cache ID: 216:EC2:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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