Bug 2083992 (CVE-2022-1671) - CVE-2022-1671 kernel: null-ptr-deref bugs in net/rxrpc/server_key.c in rxrpc_preparse_s
Summary: CVE-2022-1671 kernel: null-ptr-deref bugs in net/rxrpc/server_key.c in rxrpc_...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2022-1671
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: 2084037 2084038
Blocks: 2083989 2084035
TreeView+ depends on / blocked
 
Reported: 2022-05-11 07:42 UTC by Rohit Keshri
Modified: 2022-08-29 10:02 UTC (History)
48 users (show)

Fixed In Version: kernel 5.18 rc1
Doc Type: If docs needed, set a value
Doc Text:
A NULL pointer dereference flaw was found in rxrpc_preparse_s in net/rxrpc/server_key.c in the Linux kernel. This flaw allows a local attacker to crash the system or leak internal kernel information.
Clone Of:
Environment:
Last Closed: 2022-08-29 10:02:36 UTC

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Description Rohit Keshri 2022-05-11 07:42:33 UTC 
There are some null-ptr-deref bugs in server_key.c in net/rxrpc/server_key.c in the latest kernel, unprivileged users can easily trigger it via ioctl.

#Root Cause
Some function calls are not implemented in rxrpc_no_security, there are preparse_server_key, free_preparse_server_key and destroy_server_key.

When rxrpc security type is rxrpc_no_security, unprivileged users can easily trigger a null-ptr-deref bug via ioctl. So judgment should be added to prevent it
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