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Re: [libvirt] [PATCH] rpc: Fix crash on error paths of message dispatching



Peter Krempa wrote:
> On 01/28/13 19:58, Eric Blake wrote:
>> On 01/28/2013 11:35 AM, Peter Krempa wrote:
>>> When reading and dispatching of a message failed the message was freed
>>> but wasn't removed from the message queue.
>>>
>>> After that when the connection was about to be closed the pointer for
>>> the message was still present in the queue and it was passed to
>>> virNetMessageFree which tried to call the callback function from an
>>> uninitialized pointer.
>>>
>>> This patch removes the message from the queue before it's freed.
>>
>> Mention CVE-2013-0170 in the commit message, now that it is public:
>> https://bugzilla.redhat.com/show_bug.cgi?id=893450
>>
>>>
>>> * rpc/virnetserverclient.c: virNetServerClientDispatchRead:
>>>      - avoid use after free of RPC messages
>>> ---
>>>   src/rpc/virnetserverclient.c | 3 +++
>>>   1 file changed, 3 insertions(+)
>>
>> ACK.  Looks like we need this on {v0.10.2,v0.9.11,v0.9.6}-maint as well.
>
> Thanks. I added the CVE notice and pushed to upstream and the v0.10.2
> and v0.9.11 maint branches. v0.9.6 is not vulnerable. The problem was
> introduced in 0.9.7

Hi Peter,

Looks like 0.9.6 was vulnerable since this made its way to the
v0.9.6-maint branch as well.  Do you happen to know when this was
introduced?

Thanks,
Jim



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