PT-2018-17026 · F5 · F5 Big-Ip

Published 2018-07-19 · Updated 2019-10-03 · CVE-2018-5532

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions F5 BIG-IP versions 11.2.1 through 11.5.6 F5 BIG-IP versions 11.6.0 through 11.6.3.1 F5 BIG-IP versions 12.1.0 through 12.1.2 F5 BIG-IP version 13.0.0

Description The issue concerns the DNS Cache of TMM, where a cached domain name may still be resolved even after the parent server has revoked the record. This occurs when the DNS Cache receives a continuous stream of requests for the cached name.

Recommendations For F5 BIG-IP versions 11.2.1 through 11.5.6, consider clearing the DNS Cache of TMM to remove the revoked record. For F5 BIG-IP versions 11.6.0 through 11.6.3.1, consider clearing the DNS Cache of TMM to remove the revoked record. For F5 BIG-IP versions 12.1.0 through 12.1.2, consider clearing the DNS Cache of TMM to remove the revoked record. For F5 BIG-IP version 13.0.0, consider clearing the DNS Cache of TMM to remove the revoked record.

Fix

Related Identifiers

CVE-2018-5532

Affected Products

F5 Big-Ip

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2018-5532 · Security Note
• https://osv.dev/vulnerability/CVE-2018-5532 · Vendor Advisory
• https://support.f5.com/csp/article/K48224824 · Vendor Advisory
• http://securitytracker.com/id/1041345 · Note