Date: Wed, 1 Jul 2015 22:48:57 -0400 (EDT) From: cve-assign@...re.org To: carnil@...ian.org Cc: cve-assign@...re.org, oss-security@...ts.openwall.com, benh@...ian.org Subject: Re: CVE Request: UDP checksum DoS -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 > https://twitter.com/grsecurity/status/605854034260426753 > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=beb39db59d14990e401e235faf66a6b9b31240b0 > remote DoS via flood of UDP packets with invalid checksums It appears that you are primarily asking for a CVE ID for the issue involving the absence of a cond_resched call. Use CVE-2015-5364. However, the presence of "return -EAGAIN" may also have been a security problem in some realistic circumstances. For example, maybe there's an attacker who can't transmit a flood with invalid checksums, but can sometimes inject one packet with an invalid checksum. The goal of this attacker isn't to cause a system hang; the goal is to cause an EPOLLET epoll application to stop reading for an indefinitely long period of time. This scenario can't also be covered by CVE-2015-5364. Is it better to have no CVE ID at all, e.g., is udp_recvmsg/udpv6_recvmsg simply not intended to defend against this scenario? - -- CVE assignment team, MITRE CVE Numbering Authority M/S M300 202 Burlington Road, Bedford, MA 01730 USA [ PGP key available through http://cve.mitre.org/cve/request_id.html ] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (SunOS) iQEcBAEBAgAGBQJVlKXfAAoJEKllVAevmvmsTSgH/jryA2NkD/Xd0D4sGAuyThe5 1Z2ZH82+foJHpPX6gd5HEdzwxlPMIWIj5Todj1YbDc/p0YHSfUitamIZNRI1LSCI 9V+ZOH+7SFk0ezeuVwNKwKS1QdfT7BROsEPY+PdmZ7MayHTBIfi3Rc94pkDe0OHI rjf7DHiOcV9D5SgSscEm7H02PlPXw8tBPsfF2zxJkdobDh19YSLXUB3B2rcCz4vA +z5dhx/SuxuAwfvY+a+wP4xXxvpMmp3pO2CAnxvcVaOVjw18oYS5GegvrPWgDEiL F2QPkzBs4BYGUPPIzsR8CaduV2g/IsZjF4aHokIY86HQ1FI85MMnXNXRbqQxPFk= =f64G -----END PGP SIGNATURE-----
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