Improper input validation in Apache Vcl
CVE-2018-11773
Apache VCL versions 2.1 through 2.5 do not properly validate form input when processing a submitted block allocation. The form data is then used as an argument to the php built in function strtotime. This allows for an attack against the underlying implementation of that function. The implementation of strtotime at the time the issue was discovered appeared to be resistant to a malicious attack. However, all VCL systems running versions earlier than 2.5.1 should be upgraded or patched. This vulnerability was found and reported to the Apache VCL project by ADLab of Venustech.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.021 (79.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Apache Vcl — versions 2.1 through 2.5
- Apache Virtual_computing_lab
Weakness classification (CWE)
References
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
Frequently asked questions
- What is CVE-2018-11773?
- CVE-2018-11773 is a critical-severity vulnerability in Apache Vcl, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2019-07-29.
- How severe is CVE-2018-11773?
- Critical severity. CVSS v3 base score is 9.8 out of 10.