Bug 1959673 (CVE-2021-32606) - CVE-2021-32606 kernel: isotp_setsockopt in net/can/isotp.c allows privilege escalation via use-after-free
Summary: CVE-2021-32606 kernel: isotp_setsockopt in net/can/isotp.c allows privilege e...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2021-32606
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1959674 1960246
Blocks: 1959675
TreeView+ depends on / blocked
 
Reported: 2021-05-12 05:01 UTC by Marian Rehak
Modified: 2022-05-17 08:53 UTC (History)
44 users (show)

Fixed In Version:
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Doc Text:
A flaw was found in the Linux kernel. A use-after-free flaw in isotp_setsockopt leads to arbitrary kernel execution by overwriting the sk_error_report() pointer which can be misused in order to execute a user-controlled ROP chain to gain root privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Clone Of:
Environment:
Last Closed: 2021-05-13 12:05:44 UTC
Embargoed:

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Description Marian Rehak 2021-05-12 05:01:13 UTC 
The isotp_setsockopt in net/can/isotp.c allows a use-after-free. This leads to arbitrary kernel execution by overwriting the sk_error_report()
pointer, which can be misused in order to execute a user-controlled ROP chain to gain root privileges.

External Reference:

https://www.openwall.com/lists/oss-security/2021/05/11/16
Comment 1 Marian Rehak 2021-05-12 05:01:45 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1959674]
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