oss-sec mailing list archives
Re: CVE Request: UDP checksum DoS
From: Ben Hutchings <benh () debian org>
Date: Mon, 06 Jul 2015 01:56:03 +0100
On Wed, 2015-07-01 at 22:48 -0400, cve-assign () mitre org wrote:
https://twitter.com/grsecurity/status/605854034260426753 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=beb39db59d14990e401e235faf66a6b9b31240b0remote DoS via flood of UDP packets with invalid checksumsIt 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?
It seems reasonable to assign a second CVE ID to that issue. Ben. -- Ben Hutchings - Debian developer, member of Linux kernel and LTS teams
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Current thread:
- Re: CVE Request: UDP checksum DoS cve-assign (Jul 01)
- Re: CVE Request: UDP checksum DoS Ben Hutchings (Jul 05)
- Re: CVE Request: UDP checksum DoS cve-assign (Jul 06)
- Re: Re: CVE Request: UDP checksum DoS Gsunde Orangen (Jul 10)
- Re: CVE Request: UDP checksum DoS cve-assign (Jul 06)
- Re: CVE Request: UDP checksum DoS Ben Hutchings (Jul 05)