Advisory Details

December 10th, 2018

Apache2 mod_http2 header Denial of Service Vulnerability

ZDI-18-1369
ZDI-CAN-7168

CVE ID CVE-2018-11763
CVSS SCORE 5.3, AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
AFFECTED VENDORS Apache
AFFECTED PRODUCTS HTTPD Server 2.x
VULNERABILITY DETAILS

This vulnerability allows remote attackers to create a denial of service condition on vulnerable installations of Apache HTTPD server. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of HTTP2 headers. A crafted HTTP2 request can trigger a read past the end of an allocated buffer. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.

ADDITIONAL DETAILS Apache has issued an update to correct this vulnerability. More details can be found at:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-11763
DISCLOSURE TIMELINE
  • 2018-08-22 - Vulnerability reported to vendor
  • 2018-12-10 - Coordinated public release of advisory
CREDIT David Fiser
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