security

Disabling Request Body Access in ModSecurity 3 Leads to Complete Bypass

If you are running ModSecurity 3 with request body access disabled, then I have some bad news. Please sit down, this will be a while. If you are running ModSecurity 2, or you give the engine access to the request body, then you are not affected. But maybe you want to read this post nevertheless. …

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CVE-2019-19886 – HIGH – DoS against libModSecurity 3

The ModSecurity 3.0.x release line suffers from a Denial of Service vulnerability after triggering a segmentation fault on the webserver when parsing a malformed cookie header. All users of ModSecurity 3.0.0 – 3.0.3 should update to ModSecurity 3.0.4 as soon as possible. ModSecurity 2.x is not affected. The CVSS score for the vulnerability is 7.5 …

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Regular Expression DoS weaknesses in CRS

Somdev Sangwan has discovered several Regular Expression Denial of Service (ReDoS) weaknesses in the rules provided by the CRS project. They are listed under the following CVEs: CVE-2019–11387 CVE-2019–11388 CVE-2019–11389 CVE-2019–11390 CVE-2019–11391 The fact that CRS is affected by ReDoS is not particularly surprising and truth be told, we knew that was the case. We …

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