Date: Sat, 28 May 2022 22:04:26 +0200 From: Solar Designer <solar@...nwall.com> To: Mike O'Connor <mjo@...o.mi.org> Cc: oss-security@...ts.openwall.com, peterz@...radead.org, nslusarek@....net Subject: Re: CVE-2022-1729: race condition in Linux perf subsystem leads to local privilege escalation On Fri, May 27, 2022 at 07:26:50AM -0400, Mike O'Connor wrote: > :I think it's important to remember that closed mailing lists filled > :with private/embargoed exploits become valuable targets. They have > :been compromised ever since Zardoz in the 1980s, vendor-sec was > :discontinued for the same reason. By keeping zerodays in linux-distros > :you paint a target on every recipient of the list. You should assume > > Every recipient Right. > and their upstream providers. Luckily, this is mostly not the case with (linux-)distros since all messages relayed by the list are encrypted to their recipients' keys. I say "mostly" because of possible two-stage attacks - where someone got only temporary access to a subscriber's computer to compromise the private key, but then targets their provider(s) for continued access to encrypted messages. > :that any working exploit code you share to a mailing list will > :eventually fall into the hands of bad actors. Therefore, I don't think > :selective full-disclosure works. > > Long ago, I suggested that such mailing lists should PLAN to be public > eventually, and disclose the info themselves before someone beats them > to it. For example, when June comes up, April linux-distros archives > are made public, and that's advertised and known. Given its two week > max embargo period, this shouldn't pose an issue for anyone. There is > value in (eventually) seeing the sausage being made. I know Solar has > made old linux-distros mailing list metadata public, has advised folks > that "any/all list postings may be made public once the corresponding > security issue is publicly disclosed". I suggest "may" become "will > eventually". Yes, I recall you had suggested that, and it's within consideration. Alexander
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