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Re: SUSE Security Announcement: kernel (SUSE-SA:2004:028)



Thomas Biege wrote:

   Various signedness issues and integer overflows have been fixed within
   kNFSd and the XDR decode functions of kernel 2.6.
   These bugs can be triggered remotely by sending a package with a trusted
   source IP address and a write request with a size greater then 2^31.
   The result will be a kernel Oops, it is unknown if this bug is otherwise
   exploitable yet.
   Kernel 2.4 nfsd code is different but may suffer from the same
   vulnerability.
The iSEC people have read the nfsd code from 2.4 and it seems to be vulnerable too, however only authenticated clients could reach the problematic places at all. Having a writeable NFS share is probably a bad idea anyway...