QID 198539

Date Published: 2021-10-28

QID 198539: Ubuntu Security Notification for strongSwan Vulnerabilities (USN-5111-1)

Strongswan incorrectly handled certain rsassa-pss signatures.
Strongswan incorrectly handled replacing certificates in the cache.

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

a remote attacker could use this issue to cause strongswan to crash, resulting in a denial of service. (
Cve-2021-41990).
A remote attacker could use this issue to cause strongswan to crash, resulting in a denial of service, or possibly execute arbitrary code. (
Cve-2021-41991).

  • CVSS V3 rated as High - 7.5 severity.
  • CVSS V2 rated as Medium - 5 severity.
    • Solution
    Refer to Ubuntu advisory: USN-5111-1 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 198539

    CVE-2021-41991 | CVE-2021-41990 |
    Software Advisories
    Advisory ID Software Component Link
    USN-5111-1 Ubuntu Linux URL Logo ubuntu.com/security/notices/USN-5111-1
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