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Date: Wed, 10 Apr 2024 15:16:21 +0000
From: Bryan Call <bcall@...che.org>
To: oss-security@...ts.openwall.com
Subject: CVE-2024-31309: Apache Traffic Server: HTTP/2 CONTINUATION frames
can be utilized for DoS attack
Severity: moderate
Affected versions:
- Apache Traffic Server 8.0.0 through 8.1.9
- Apache Traffic Server 9.0.0 through 9.2.3
Description:
HTTP/2 CONTINUATION DoS attack can cause Apache Traffic Server to consume more resources on the server. Version from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.3 are affected.
Users can set a new setting (proxy.config.http2.max_continuation_frames_per_minute) to limit the number of CONTINUATION frames per minute. ATS does have a fixed amount of memory a request can use and ATS adheres to these limits in previous releases.
Users are recommended to upgrade to versions 8.1.10 or 9.2.4 which fixes the issue.
Credit:
Bartek Nowotarski (reporter)
References:
https://lists.apache.org/thread/f9qh3g3jvy153wh82pz4onrfj1wh13kc
https://trafficserver.apache.org/
https://www.cve.org/CVERecord?id=CVE-2024-31309
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