What is CVE-2015-3991?

CVE-2015-3991 is a critical-severity software vulnerability (CWE-19) with a CVSS score of 9.8. strongSwan 5.2.2 and 5.3.0 allows remote attackers to cause a denial of service (daemon crash) or execute arbitrary code.

Is CVE-2015-3991 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 5%.

What products does CVE-2015-3991 affect?

Tracked products affected include strongSwan. Check the version you run to see whether it is affected.

How do I fix CVE-2015-3991?

Apply the vendor fix promptly. Upgrade affected products to a fixed version.

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CVE-2015-3991

CRITICAL severity · CVSS 9.8 · CWE-19

9.8CVSS CRITICAL

Summary

strongSwan 5.2.2 and 5.3.0 allows remote attackers to cause a denial of service (daemon crash) or execute arbitrary code.

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

Confidentiality impactHigh

Integrity impactHigh

Availability impactHigh

Exploit probability (EPSS)5%

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products we track (1)

strongSwan

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Additional information

NVD record
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/164276.htmlAdvisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/164278.htmlAdvisory
http://www.securityfocus.com/bid/76861Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1222815Advisory
https://www.strongswan.org/blog/2015/06/01/strongswan-vulnerability-%28cve-2015-3991%29.html