Bug 83143 - VUL-0: CVE-2005-1762: kernel: amd64 / ptrace can crash the kernel
Summary: VUL-0: CVE-2005-1762: kernel: amd64 / ptrace can crash the kernel
Status: RESOLVED FIXED
Alias: None
Product: SUSE Security Incidents
Classification: Novell Products
Component: Incidents (show other bugs)
Version: unspecified
Hardware: x86-64 All
: P5 - None : Normal
Target Milestone: ---
Assignee: Security Team bot
QA Contact: Security Team bot
URL:
Whiteboard: CVE-2005-1762: CVSS v2 Base Score: 2....
Keywords:
Depends on:
Blocks:
 
Reported: 2005-05-09 20:59 UTC by Andreas Kleen
Modified: 2021-09-26 10:34 UTC (History)
0 users

See Also:
Found By: Other
Services Priority:
Business Priority:
Blocker: ---
Marketing QA Status: ---
IT Deployment: ---

Attachments
Check for canonical addresses in ptrace correctly (638 bytes, patch)
2005-05-09 21:01 UTC, Andreas Kleen 		Details | Diff
Check segment bases in ptrace correctly (1004 bytes, patch)
2005-05-13 15:35 UTC, Andreas Kleen 		Details | Diff
Fix check to see if RIP is canonical in ptrace (647 bytes, patch)
2005-05-31 12:22 UTC, Andreas Kleen 		Details | Diff
Show Obsolete (1) View All Add an attachment (proposed patch, testcase, etc.)

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Description Andreas Kleen 2005-05-09 20:59:21 UTC 
There is a bug in the code checking for non canonical addresses while
setting 64bit segment registers. This allows any user process to
oops the kernel.
Comment 1 Andreas Kleen 2005-05-09 20:59:51 UTC 
Problem should be in all x86-64 kernels released, so it would need
to be backported to all maintained kernels.
Comment 2 Andreas Kleen 2005-05-09 21:01:11 UTC 
Created attachment 36726 [details]
Check for canonical addresses in ptrace correctly

Patch from mainline
Comment 3 Ludwig Nussel 2005-05-10 07:07:02 UTC 
Is it public?
Comment 4 Marcus Meissner 2005-05-10 11:15:56 UTC 
can you backport the patch to our kernel releases?
Comment 5 Andreas Kleen 2005-05-13 13:36:33 UTC 
It should apply to SLES with some offset. Yes the problem is public.
Code hasn't changed much for quite some time, so porting it to other
kernels should be easy.
Comment 6 Andreas Kleen 2005-05-13 15:35:01 UTC 
Created attachment 37111 [details]
Check segment bases in ptrace correctly


Sorry the previous patch was wrong and for another bug.
Here is the correct patch. Hubert can you apply 
that everywhere (including SLES8)?
Comment 7 Hubert Mantel 2005-05-17 14:22:00 UTC 
done.
Comment 8 Andreas Kleen 2005-05-17 14:23:17 UTC 
Thanks, But sorry, there is a report for another ptrace bug that needs
to be fixed too. Bugzilla will come in a jiffie.
Comment 9 Marcus Meissner 2005-05-30 07:43:29 UTC 
the patch in SP1 branch is missing this hunk from 2.6.11.11 patch: 
 
is it needed ? 
 
--- a/arch/x86_64/kernel/ptrace.c 
+++ b/arch/x86_64/kernel/ptrace.c 
@@ -149,6 +149,11 @@ static int putreg(struct task_struct *ch 
                                return -EIO; 
                        value &= 0xffff; 
                        break; 
+               case offsetof(struct user_regs_struct, rip): 
+                       /* Check if the new RIP address is canonical */ 
+                       if (value >= TASK_SIZE) 
+                               return -EIO; 
+                       break; 
        } 
        put_stack_long(child, regno - sizeof(struct pt_regs), value); 
        return 0;
Comment 10 Hubert Mantel 2005-05-31 12:10:33 UTC 
We tell all of our partners: DO NOT PASTE PATCHES INTO BUGZILLA REPORTS!!!
Submit them as attachment, otherwise it is useless. So please, please, with
sugar on top, don't waste our time.
Comment 11 Andreas Kleen 2005-05-31 12:22:43 UTC 
Created attachment 38369 [details]
Fix check to see if RIP is canonical in ptrace

Here's the patch as attachment. That's the real
ptrace-canonical now (we might have another one
of the same name unfortunately in the tree)
Comment 12 Ludwig Nussel 2005-06-08 16:04:45 UTC 
ptrace-check-segment CAN-2005-0756 
ptrace-canonical CAN-2005-1762
Comment 13 Ludwig Nussel 2005-06-09 12:43:42 UTC 
updates released
Comment 14 Thomas Biege 2009-10-13 21:22:22 UTC 
CVE-2005-1762: CVSS v2 Base Score: 2.1 (AV:L/AC:L/Au:N/C:N/I:N/A:P)