Bug 2004108 (CVE-2021-40839) - CVE-2021-40839 python-rencode: an infinite loop in typecode decoding allowing a remote DoS
Summary: CVE-2021-40839 python-rencode: an infinite loop in typecode decoding allowing...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2021-40839
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
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Depends On: 2004109 2004110
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-09-14 14:00 UTC by Marian Rehak
Modified: 2021-09-14 18:21 UTC (History)
2 users (show)

Fixed In Version:
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Last Closed: 2021-09-14 18:21:41 UTC
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Description Marian Rehak 2021-09-14 14:00:27 UTC 
The rencode package through 1.0.6 for Python allows an infinite loop in typecode decoding (such as via ;\x2f\x7f), enabling a remote attack that consumes CPU and memory.

External Reference:

https://seclists.org/fulldisclosure/2021/Sep/16
Comment 1 Marian Rehak 2021-09-14 14:00:46 UTC 
Created python-rencode tracking bugs for this issue:

Affects: epel-all [bug 2004110]
Affects: fedora-all [bug 2004109]
Comment 2 Product Security DevOps Team 2021-09-14 18:21:41 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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