SB2024121157 - Multiple vulnerabilities in Undertow

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Resource management error (CVE-ID: CVE-2024-4109)

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to incorrect handling of HTTP/2 requests when reusing connections, which results in parts of data from previous connection to be included into new responses. A remote attacker can send an HTTP/2 request to the server and gain access to potentially sensitive information.

2) Resource exhaustion (CVE-ID: CVE-2025-9784)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources when handling HTTP/2 requests. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

The vulnerability was dubbed HTTP/2 Made You Reset Attack.

Remediation

Install update from vendor's website.

References

• https://bugzilla.redhat.com/show_bug.cgi?id=2272325
• https://bugzilla.redhat.com/show_bug.cgi?id=2392306
• https://github.com/undertow-io/undertow/pull/1778
• https://github.com/undertow-io/undertow/releases/tag/2.2.38.Final
• https://issues.redhat.com/browse/UNDERTOW-2598
• https://www.kb.cert.org/vuls/id/767506