https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255869
Bug ID: 255869
Summary: [PATCH] kern: Fix a use after free bug in sodealloc
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Created attachment 224933
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=224933&action=edit
adds a variable cr_uidinfo
Bug File: sys/kern/uipc_socket.c
In Function sodealloc, so->so_cred is freed via crfree() at line 479.
But, the freed so->so_cred is dereferenced by so->so_cred->cr_uidinfo at line
486 and 489, which are uaf bugs.
My patch adds a variable cr_uidinfo to avoid the uaf bugs.
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