Date: Tue, 12 Jan 2021 09:04:49 +0100 From: Greg KH <greg@...ah.com> To: oss-security@...ts.openwall.com Subject: Re: CVE-2021-20177 kernel: iptables string match rule could result in kernel panic On Tue, Jan 12, 2021 at 04:58:07PM +1000, Wade Mealing wrote: > Gday, > > A flaw was found in the Linux kernels implementation of string matching > within a packet. A privileged user > (with root or CAP_NET_ADMIN ) when inserting iptables rules could insert a > rule which can panic the system. > > Likely a user with these permissions could do worse, however it crashes the > system (DOS) and the user is going to have a bad day > especially if the rule is inserted and restored on every boot. > > At this time it doesn't affect RHEL releases, and there are fixes already > in multiple upstream trees. > > Thanks, > > Wade Mealing > > Upstream patch: > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ca58fbe06c54 > > Upstream bugzilla: > https://bugzilla.kernel.org/show_bug.cgi?id=209823 > > Red Hat Bugzilla: > https://bugzilla.redhat.com/show_bug.cgi?id=1914719 I still do not understand why you report issues that are fixed over a year ago (October 2019) and assign them a CVE like this. Who does this help out? And what about the thousands of other issues that are fixed in the kernel and not assigned a CVE like this, are they somehow not as important to your group? What determines what you want to give a CVE to and what you do not? thanks, greg k-h
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