CVE-2021-45711 Explained : Impact and Mitigation
Learn about CVE-2021-45711, a vulnerability in simple_asn1 crate 0.6.0 before 0.6.1 for Rust. Understand the impact, affected versions, exploitation mechanism, and mitigation steps.
An issue was discovered in the simple_asn1 crate 0.6.0 before 0.6.1 for Rust where a panic occurs if UTCTime data, supplied by a remote attacker, has a second character greater than 0x7f.
Understanding CVE-2021-45711
This section provides insights into the nature and implications of CVE-2021-45711.
What is CVE-2021-45711?
CVE-2021-45711 describes a vulnerability in the simple_asn1 crate version 0.6.0 before 0.6.1 for Rust. The issue arises when UTCTime data with specific characteristics is provided by a remote attacker, leading to a critical panic situation.
The Impact of CVE-2021-45711
The vulnerability can be exploited by malicious actors to trigger a panic condition in the affected software, potentially leading to denial of service or other security breaches.
Technical Details of CVE-2021-45711
Exploring the technical specifics of CVE-2021-45711.
Vulnerability Description
The vulnerability in the simple_asn1 crate stems from mishandling UTCTime data with a second character greater than 0x7f, resulting in a panic scenario.
Affected Systems and Versions
- Affected Version: 0.6.0
- Fixed Version: 0.6.1
Exploitation Mechanism
The vulnerability can be exploited by providing manipulated UTCTime data, which, if containing the specific conditions, triggers a panic within the software.
Mitigation and Prevention
Measures to address and prevent the CVE-2021-45711 vulnerability.
Immediate Steps to Take
- Users are advised to update to version 0.6.1 of the simple_asn1 crate to mitigate the vulnerability.
- Implement input validation mechanisms to filter out potentially malicious UTCTime data.
Long-Term Security Practices
- Regularly monitor for security advisories and updates related to the simple_asn1 crate.
- Conduct thorough security audits and code reviews to identify and address similar vulnerabilities proactively.
Patching and Updates
Users should promptly apply the patch provided in version 0.6.1 of the simple_asn1 crate to ensure the software is immune to the vulnerability.