Severity
Medium
Vendor
Canonical Ubuntu
Versions Affected
- Canonical Ubuntu 16.04
- Canonical Ubuntu 18.04
Description
Paul Kehrer discovered that OpenSSL incorrectly handled certain input lengths in EVP functions. A remote attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2021-23840)
Tavis Ormandy discovered that OpenSSL incorrectly handled parsing issuer fields. A remote attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2021-23841)
CVEs contained in this USN include: CVE-2021-23841, CVE-2021-23840.
Affected Cloud Foundry Products and Versions
Severity is medium unless otherwise noted.
- cflinuxfs3
- All versions prior to 0.224.0
- Xenial Stemcells
- 456.x versions prior to 456.144
- 621.x versions prior to 621.107
- All other stemcells not listed.
- CF Deployment
- All versions prior to 16.5.0
Mitigation
Users of affected products are strongly encouraged to follow the mitigations below. The Cloud Foundry project recommends upgrading the following releases:
- cflinuxfs3
- Upgrade All versions to 0.224.0 or greater
- Xenial Stemcells
- Upgrade 456.x versions to 456.144 or greater
- Upgrade 621.x versions to 621.107 or greater
- All other stemcells should be upgraded to the latest version available on bosh.io.
- CF Deployment
- Upgrade All versions to 16.5.0 or greater
References
History
2021-03-02: Initial vulnerability report published.
