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
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.

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 software 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 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 The best possible mitigation is suggested to be upgrading to the latest version.





  • open-source

CPE 2.3info

CPE 2.2info


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: 🔍



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


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: 🔍


Threat Intelligenceinfo

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


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: OpenSSL 1.1.1j/1.0.2za


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



Advisory: 20210824.txt
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-3712 (🔍)


Created: 08/24/2021 07:37 PM
Updated: 08/26/2021 04:22 PM
Changes: 08/24/2021 07:37 PM (42), 08/26/2021 04:22 PM (3)
Complete: 🔍


No comments yet. Languages: en.

Please log in to comment.

Do you know our Splunk app?

Download it now for free!