OpenSSL up to 1.0.2y/1.1.1k ASN.1 out-of-bounds

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
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3.6$0-$5k0.00

A vulnerability was found in OpenSSL up to 1.0.2y/1.1.1k (Network Encryption Software). It has been declared as problematic. Affected by this vulnerability is the function d2i/X509_get1_email/X509_REQ_get1_email/X509_get1_ocsp of the component ASN.1 Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability.

The weakness was presented 08/24/2021 as 20210824.txt. The advisory is shared at openssl.org. This vulnerability is known as CVE-2021-3712. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/24/2021).

Upgrading to version 1.1.1j or 1.0.2za eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.openssl.org. The best possible mitigation is suggested to be upgrading to the latest version.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.6

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
ATT&CK: Unknown

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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: OpenSSL 1.1.1j/1.0.2za
Patch: git.openssl.org

Timelineinfo

08/16/2021 🔍
08/24/2021 +8 days 🔍
08/24/2021 +0 days 🔍
08/26/2021 +2 days 🔍

Sourcesinfo

Product: openssl.org

Advisory: 20210824.txt
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-3712 (🔍)

Entryinfo

Created: 08/24/2021 19:37
Updated: 08/26/2021 16:22
Changes: 08/24/2021 19:37 (42), 08/26/2021 16:22 (3)
Complete: 🔍

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