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Date: Mon, 25 Jan 2021 09:55:55 -0700
From: ocket 8888 <ocket8888@...il.com>
To: oss-security@...ts.openwall.com
Subject: CVE-2020-17522: Traffic Control Mid Tier Cache Manipulation Attack
CVE-2020-17522: Mid Tier Cache Manipulation Attack
Severity: Important
Vendor:
The Apache Software Foundation
Versions Affected:
Traffic Control 3.0.0 to 3.1.0
Traffic Control 4.0.0 to 4.1.0
The unsupported Traffic Control 3.x versions may be also affected
Description:
When ORT (now via atstccfg) generates ip_allow.config
files, those files include permissions that allow bad actors to push
arbitrary content into and remove arbitrary content from CDN cache servers.
Additionally, these permissions are potentially extended to IP addresses
outside the desired range, resulting in them being granted to clients
possibly outside the CDN arcitechture.
Mitigation:
3.x users should upgrade to 4.1.1, 5.0.0, or later versions
4.0.x and 4.1.0 users should upgrade to 4.1.1 or later versions
Credit:
This issue was discovered by Chris Lemmons of Comcast.
References:
https://trafficcontrol.apache.org/security/
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