Bug#296900: marked as done (CAN-2005-0529: Buffer overflow in proc_file_read)
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From: Stefan Fritsch <sf@sfritsch.de>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: CAN-2005-0529: Buffer overflow in proc_file_read
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Date: Fri, 25 Feb 2005 15:30:30 +0100
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Package: kernel-source-2.6.8
Version: 2.6.8-13
Severity: critical
Tags: security
Justification: root security hole
Cite:
" Linux kernel 2.6.10 and 2.6.11rc1-bk6 uses different size types
for offset arguments to the proc_file_read and locks_read_proc
functions, which leads to a heap-based buffer overflow when a
signed comparison causes negative integers to be used in a positive
context."
The offending code is also in 2.6.8.
A fix is at:
http://linux.bkbits.net:8080/linux-2.6/cset@4201818eC6aMn0x3GY_9rw3ueb2ZWQ
The original advisory is at:
http://marc.theaimsgroup.com/?l=full-disclosure&m=110846727602817&w=2
The corresponding code in 2.4.27 lacks the bogus ssize_t cast. Therefore
2.4.27 should not be affected.
Please also fix 2.6.9 and 2.6.10.
-- System Information:
Debian Release: 3.1
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: i386 (i686)
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From: Stefan Fritsch <sfritsch@ph.tum.de>
To: Andres Salomon <dilinger@voxel.net>
Subject: vulnerabilites fixed in kernel-source-2.6.8 (2.6.8-14)
Date: Thu, 17 Mar 2005 12:02:03 +0100
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Cc: 299865-done@bugs.debian.org,
296900-done@bugs.debian.org,
296901-done@bugs.debian.org,
296897-done@bugs.debian.org,
296899-done@bugs.debian.org
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Hi!
Some of the fixes in 2.6.8-14 are missing CAN- and bug numbers. Maybe
you can add the CAN-numbers to the changelog?
Cheers,
Stefan
==============================
* 2.6.11.2 [SECURITY] epoll: return proper error on overflow
condition
(Maximilian Attems)
#299865: CAN-2005-0736: Boundary condition error in sys_epoll_wait
* [SECURITY] 115-proc_file_read_nbytes_signedness_fix.dpatch
Heap overflow fix in /proc; WDYBTGT3-1 on
http://www.guninski.com/where_do_you_want_billg_to_go_today_3.html
No CAN# assigned yet, afaik (Andres Salomon).
#296900: CAN-2005-0529: Buffer overflow in proc_file_read
* [SECURITY] 116-n_tty_copy_from_read_buf_signedness_fixes.dpatch
copy_from_read_buf() fix; WDYBTGT3-2 on
http://www.guninski.com/where_do_you_want_billg_to_go_today_3.html
No CAN#, yet (Andres Salomon).
#296901: CAN-2005-0530: information disclosure because of signedness
error in copy_from_read_buf
* [SECURITY] 117-reiserfs_file_64bit_size_t_fixes.dpatch
reiserfs integer fixes; WDYBTGT3-4 on
http://www.guninski.com/where_do_you_want_billg_to_go_today_3.html
(Andres Salomon).
#296897: CAN-2005-0532: Buffer overflow in reiserfs_copy_from_user...
on 64bit arches
* [SECURITY] 123-atm_get_addr_signedness_fix.dpatch
Fix atm_get_addr()'s usage of its size arg, by making it
unsigned. WDYBTGT3-3 on
http://www.guninski.com/where_do_you_want_billg_to_go_today_3.html
(Andres Salomon).
#296899: CAN-2005-0531: Buffer overflow in atm_get_addr
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