Security Bulletin: IBM Security Verify Access is vulnerable to Rapid Reset attacks if HTTP2 is enabled (CVE-2023-44487)

Summary

The Webseal component of IBM Security Verify Access product is vulnerable to CVE-2023-44487, a flaw in handling multiplexed streams in the HTTP/2 protocol.

Vulnerability Details

CVEID:CVE-2023-44487
**DESCRIPTION:**Multiple vendors are vulnerable to a denial of service, caused by a flaw in handling multiplexed streams in the HTTP/2 protocol. By sending numerous HTTP/2 requests and RST_STREAM frames over multiple streams, a remote attacker could exploit this vulnerability to cause a denial of service due to server resource consumption.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/268044 for the current score.
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

Remediation/Fixes

IBM encourages customers to update their systems promptly.

IBM Security Verify Access (Docker Container)

• Obtain the latest version of the container by running the command “docker pull icr.io/isva/verify-access:[tag]”

Where [tag] is the latest published version and can be confirmed here.

For the ISAM/ISVA appliances

• Obtain the latest version by obtaining the fix as shown below:

Affected Products and Versions

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Fix availability

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IBM Security Verify Access 10.0.X

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10.0.6-ISS-ISVA-FP0000

Workarounds and Mitigations

None