{"id":"CVE-2017-6156","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-6156","generatedAt":"2026-10-28T22:19:50.803Z","title":"When the F5 BIG-IP 12.1.0-12.1.1, 11.6.0-11.6.1, 11.5.1-11.5.5, or 11.2.1 system is configured with a wildcard IPSec tunnel endpoint, it may allow a remote attacker to disrupt or impersonate the tunnels that have completed phase 1 IPSec negotiations.","description":"When the F5 BIG-IP 12.1.0-12.1.1, 11.6.0-11.6.1, 11.5.1-11.5.5, or 11.2.1 system is configured with a wildcard IPSec tunnel endpoint, it may allow a remote attacker to disrupt or impersonate the tunnels that have completed phase 1 IPSec negotiations. The attacker must possess the necessary credentials to negotiate the phase 1 of the IPSec exchange to exploit this vulnerability; in many environment this limits the attack surface to other endpoints under the same administration.","published":"2018-04-13T13:29:00.000Z","lastModified":"2026-06-17T01:21:52.000Z","status":"Modified","sourceIdentifier":"f5sirt@f5.com","cvss":{"version":"3.0","score":6.4,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H"},"cwe":[],"affected":["f5/big-ip local traffic manager","f5/big-ip application acceleration manager","f5/big-ip advanced firewall manager","f5/big-ip analytics","f5/big-ip access policy manager","f5/big-ip application security manager","f5/big-ip edge gateway","f5/big-ip global traffic manager","f5/big-ip link controller","f5/big-ip policy enforcement manager","f5/big-ip webaccelerator","f5/big-ip websafe","f5/big-ip domain name system"],"epss":{"score":0.00905,"percentile":0.59623,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.91%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://support.f5.com/csp/article/K05263202","tags":["Vendor Advisory"],"source":"f5sirt@f5.com"},{"url":"https://support.f5.com/csp/article/K05263202","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-6156","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}