- Vulnerability/
- USN-5051-1
USN-5051-1: OpenSSL vulnerabilities
First published: Tue Aug 24 2021(Updated: )
John Ouyang discovered that OpenSSL incorrectly handled decrypting SM2 data. A remote attacker could use this issue to cause applications using OpenSSL to crash, resulting in a denial of service, or possibly change application behaviour. (CVE-2021-3711) Ingo Schwarze discovered that OpenSSL incorrectly handled certain ASN.1 strings. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service, or possibly obtain sensitive information. (CVE-2021-3712)
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| ubuntu/libssl1.1 | <1.1.1j-1ubuntu3.5 | 1.1.1j-1ubuntu3.5 |
| Ubuntu | =21.04 | |
| All of | ||
| ubuntu/libssl1.1 | <1.1.1f-1ubuntu2.8 | 1.1.1f-1ubuntu2.8 |
| Ubuntu | =20.04 | |
| All of | ||
| ubuntu/libssl1.1 | <1.1.1-1ubuntu2.1~18.04.13 | 1.1.1-1ubuntu2.1~18.04.13 |
| Ubuntu | =18.04 |
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Reference Links
- https://ubuntu.com/security/CVE-2021-3711
- https://ubuntu.com/security/CVE-2021-3712
- https://ubuntu.com/security/notices/USN-5051-2
- https://ubuntu.com/security/notices/USN-5051-3
- https://ubuntu.com/security/notices/USN-5088-1
- https://launchpad.net/ubuntu/+source/openssl/1.1.1j-1ubuntu3.5
- https://launchpad.net/ubuntu/+source/openssl/1.1.1f-1ubuntu2.8
- https://launchpad.net/ubuntu/+source/openssl/1.1.1-1ubuntu2.1~18.04.13
- https://ubuntu.com/security/notices/USN-5051-1 (Advisory)
Frequently Asked Questions
What is the severity of USN-5051-1?
The severity of USN-5051-1 is considered high due to the potential for denial of service and application behavior changes.
How do I fix USN-5051-1?
To fix USN-5051-1, upgrade to the latest version of the libssl1.1 package specific to your Ubuntu version.
What applications are affected by USN-5051-1?
Applications using affected versions of OpenSSL are vulnerable to the issues described in USN-5051-1.
Can USN-5051-1 lead to remote code execution?
While USN-5051-1 can cause crashes and denial of service, it does not directly enable remote code execution.
Who discovered the vulnerability in USN-5051-1?
John Ouyang and Ingo Schwarze are the researchers who discovered the vulnerabilities addressed in USN-5051-1.
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