Bug 1960504 (CVE-2020-26147) - CVE-2020-26147 kernel: reassembling mixed encrypted/plaintext fragments
Summary: CVE-2020-26147 kernel: reassembling mixed encrypted/plaintext fragments
Keywords:
Status: NEW
Alias: CVE-2020-26147
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1977679 1977680 1978181 1960505
Blocks: 1959275
TreeView+ depends on / blocked
 
Reported: 2021-05-14 03:53 UTC by Dhananjay Arunesh
Modified: 2021-09-15 05:46 UTC (History)
44 users (show)

Fixed In Version: Kernel 5.13
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in ieee80211_rx_h_defragment in net/mac80211/rx.c in the Linux Kernel's WiFi implementation. This vulnerability can be abused to inject packets or exfiltrate selected fragments when another device sends fragmented frames, and the WEP, CCMP, or GCMP data-confidentiality protocol is used. The highest threat from this vulnerability is to integrity.
Clone Of:
Environment:
Last Closed:


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Description Dhananjay Arunesh 2021-05-14 03:53:13 UTC
A vulnerability was found in Linux Kernel, where the wifi implementations reassemble fragments even though some of them were sent in plaintext. This vulnerability can be abused to inject packets and/or exfiltrate selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used.

upstream patch:
https://lore.kernel.org/linux-wireless/20210511180259.159598-1-johannes@sipsolutions.net/
https://lore.kernel.org/linux-wireless/20210511200110.30c4394bb835.I5acfdb552cc1d20c339c262315950b3eac491397@changeid/

Comment 1 Dhananjay Arunesh 2021-05-14 03:53:50 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1960505]

Comment 11 Justin M. Forbes 2021-06-29 16:21:07 UTC
This was fixed for Fedora with the 5.12.9 stable kernel updates.


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