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Security Bulletin: IBM Security Access Manager vulnerable to Slow HTTP Attack (CVE-2019-4036)

Security Bulletin


The IBM Security Access Manager product can be attacked using the Slowloris Denial of service attack

Vulnerability Details

CVEID: CVE-2019-4036
DESCRIPTION: IBM Security Access Manager Appliance could allow unauthenticated attacker to cause a denial of service in the reverse proxy component.
CVSS Base Score: 7.5
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

All Supported versions



Workarounds and Mitigations

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The vulnerability was reported to IBM by lczap

Change History

09 September 2019: Original Version Published

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.


According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

Internal Use Only

Record number:  129190
Advisory number: 14849
Advisory title: 3RD PARTY IBM Security Access Manager (ISAM) Reverse Proxy susceptible to slow HTTP attack

Document Location


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Document Information

Modified date:
09 September 2019