VDB-179956 · CVE-2021-37847 · GCVE-0-2021-37847

Pengutronix Barebox up to 2021.07.0 Digest Verification crypto/digest.c memcmp timing discrepancy

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.
2.5	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic was found in Pengutronix Barebox up to 2021.07.0. The impacted element is the function memcmp of the file crypto/digest.c of the component Digest Verification. Executing a manipulation can lead to timing discrepancy. This vulnerability is handled as CVE-2021-37847. There is not any exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability classified as problematic was found in Pengutronix Barebox up to 2021.07.0. This vulnerability affects the function memcmp of the file crypto/digest.c of the component Digest Verification. The manipulation with an unknown input leads to a timing discrepancy vulnerability. The CWE definition for the vulnerability is CWE-208. Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not. As an impact it is known to affect confidentiality.

The weakness was released 08/03/2021 as 0a9f9a7410681e55362f8311537ebc7be9ad0fbe. The advisory is shared for download at github.com. This vulnerability was named CVE-2021-37847. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Pengutronix

Name

Barebox

Version

2021.07

License

open-source

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 2.6
VulDB Meta Temp Score: 2.5

VulDB Base Score: 2.6
VulDB Temp Score: 2.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Timing discrepancy
CWE: CWE-208 / CWE-203 / CWE-200
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

08/02/2021 🔍
08/03/2021 +1 days 🔍
08/03/2021 +0 days 🔍
08/07/2021 +4 days 🔍

Sourcesinfo

Advisory: 0a9f9a7410681e55362f8311537ebc7be9ad0fbe
Status: Confirmed

CVE: CVE-2021-37847 (🔍)
GCVE (CVE): GCVE-0-2021-37847
GCVE (VulDB): GCVE-100-179956

Entryinfo

Created: 08/03/2021 12:14
Updated: 08/07/2021 08:40
Changes: 08/03/2021 12:14 (40), 08/07/2021 08:40 (2)
Complete: 🔍
Cache ID: 216::103