What is CVE-2018-5548?

CVE-2018-5548 is a medium-severity vulnerability in F5 Big-Ip Access Policy Manager, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2018-09-13.

How severe is CVE-2018-5548?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Open Redirect in F5 Big-Ip Access Policy Manager

CVE-2018-5548

On BIG-IP APM 11.6.0-11.6.3, an insecure AES ECB mode is used for orig_uri parameter in an undisclosed /vdesk link of APM virtual server configured with an access profile, allowing a malicious user to build a redirect URI value using different blocks of cipher texts.

Vulnerability class: Open Redirect

EPSS: 0.014 (70.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

F5 Big-ip_access_policy_manager
F5 Networks, Inc. Big-ip Apm — versions 11.6.0-11.6.3

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

f5sirt@f5.com (x_refsource_CONFIRM, Vendor Advisory)
f5sirt@f5.com (Technical Description, Exploit, Third Party Advisory, x_refsource_MISC)
f5sirt@f5.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)

Frequently asked questions

What is CVE-2018-5548?: CVE-2018-5548 is a medium-severity vulnerability in F5 Big-Ip Access Policy Manager, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2018-09-13.
How severe is CVE-2018-5548?: Medium severity. CVSS v3 base score is 6.1 out of 10.