Bug 2099227 (CVE-2022-33903) - CVE-2022-33903 tor: degraded congestion control through wedged RTT estimation
Summary: CVE-2022-33903 tor: degraded congestion control through wedged RTT estimation
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2022-33903
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2099228 2099229
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-06-20 11:11 UTC by Michael Kaplan
Modified: 2022-06-20 15:06 UTC (History)
7 users (show)

Fixed In Version:
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Clone Of:
Environment:
Last Closed: 2022-06-20 15:06:32 UTC


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Description Michael Kaplan 2022-06-20 11:11:17 UTC
A Denial of Service issue was fixed in tor 0.4.7.8 related to congestion control. RTT estimation can become wedged, seriously degrading congestion control performance on all circuits. This impacts clients, onion services, and relays, and can be triggered remotely by a malicious endpoint. 

References:
https://gitlab.torproject.org/tpo/core/tor/-/issues/40626
https://lists.torproject.org/pipermail/tor-announce/2022-June/000242.html
https://github.com/torproject/tor/commit/5a25374209689466e10906a77e66ad717a615a02
https://github.com/torproject/tor/commit/b0496d40197dd5b4fb7b694c1410082d4e34dda6

Comment 1 Michael Kaplan 2022-06-20 11:11:34 UTC
Created tor tracking bugs for this issue:

Affects: epel-all [bug 2099228]
Affects: fedora-all [bug 2099229]

Comment 2 Product Security DevOps Team 2022-06-20 15:06:31 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.


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