Botan up to 2.19.2 OCSP Response certificate validation

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 Botan up to 2.19.2 and classified as critical. Affected by this issue is some unknown processing of the component OCSP Response Handler. The manipulation with an unknown input leads to a certificate validation vulnerability. Using CWE to declare the problem leads to CWE-295. The software does not validate, or incorrectly validates, a certificate. Impacted is confidentiality, integrity, and availability. CVE summarizes:

In Botan before 2.19.3, it is possible to forge OCSP responses due to a certificate verification error. This issue was introduced in Botan 1.11.34 (November 2016).

The weakness was published 11/27/2022 as GHSA-4v9w-qvcq-6q7w. The advisory is available at This vulnerability is handled as CVE-2022-43705 since 10/24/2022. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1587.003 by the MITRE ATT&CK project.

Upgrading to version 2.19.3 eliminates this vulnerability. The upgrade is hosted for download at




  • open-source

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.5

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔒



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


Class: Certificate validation
CWE: CWE-295 / CWE-287
ATT&CK: T1587.003

Local: No
Remote: Partially

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: Botan 2.19.3


10/24/2022 CVE reserved
11/27/2022 +34 days Advisory disclosed
11/27/2022 +0 days VulDB entry created
12/23/2022 +26 days VulDB last update


Advisory: GHSA-4v9w-qvcq-6q7w
Status: Confirmed

CVE: CVE-2022-43705 (🔒)


Created: 11/27/2022 11:13 AM
Updated: 12/23/2022 03:59 PM
Changes: 11/27/2022 11:13 AM (41), 12/23/2022 03:59 PM (11)
Complete: 🔍


No comments yet. Languages: en.

Please log in to comment.

Do you want to use VulDB in your project?

Use the official API to access entries easily!