Date: Fri, 30 Sep 2016 00:14:04 +1000 From: Vitaly Nikolenko <vnik5287@...il.com> To: oss-security@...ts.openwall.com Cc: "cve-assign@...re.org" <cve-assign@...re.org> Subject: Re: CVE request - Linux kernel through 4.6.2 allows escalade privileges via IP6T_SO_SET_REPLACE compat setsockopt call Wasn't this already covered by CVE-2016-4997? There's a public exploit https://www.exploit-db.com/exploits/40049/ I'm assuming for IPv6 this would be exactly the same except for changing the setsockopt optname from IPT_SO_SET_REPLACE to IP6T_SO_SET_REPLACE. The code path for IPv6 looks almost identical unless I'm missing something? Commit ce683e5f9d045e5d67d1312a42b359cb2ab2a13c included fixes for ARP, IP and IPv6 and my assumption was that CVE-2016-4997 covered all of them. -- Vitaly On 29 September 2016 at 23:45, Greg KH <greg@...ah.com> wrote: > On Thu, Sep 29, 2016 at 07:43:35AM +0000, 张谦 wrote: >> Hi there, >> >> I found a memory corruption vulnerabiliry in Linux kernel through 4.6.2, and I >> have a working exploit to escalade privileges which requires the ip6_tables >> module to be loaded, that it is properly blocked on all up-to-date versions. >> >> Due to the number of users running vulnerable code(not update to 4.7 or >> higher), and that this exploit is only available to security researchers and >> kernel packagers upon request but that I don't want it to spread. >> >> >> >> I have reported this issue to Linux kernel official and they have already fixed >> this. > > Note, this was fixed many months ago, in May of 2016, and went into the > stable kernel updates in June, 2016. Any distro that updated to the > stable kernel updates received this fix then. > > Any distro that hasn't updated their kernel since then, well, you need > to revaluate your trust of such a distro :) > > thanks, > > greg k-h
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