oss-sec mailing list archives
Re: [dpdk-dev] [oss-security] DPDK security advisory for multiple vhost crypto issues
From: Mauro Matteo Cascella <mcascell () redhat com>
Date: Mon, 4 Jan 2021 14:27:59 +0100
On Mon, Jan 4, 2021 at 12:29 PM Ferruh Yigit <ferruh.yigit () intel com> wrote:
On 1/4/2021 8:28 AM, Mauro Matteo Cascella wrote:Hello, Is there any particular reason for the Scope metric to be Unchanged (S:U) for CVE-2020-14377 and CVE-2020-14378?removed dpdk-announce mail list Hi Mauro, CVE-2020-14377, the memory over read is in the scope of the same application, that is the reason of the unchanged scope. There is another CVE below that can use this information to figure out where to overwrite for remote execution which has scope set as 'Changed'. CVE-2020-14378, can cause loop taken longer time and delays the service, since it is eating the core cycles, if there is something else using that specific core technically it may delay it too, but DPDK mostly uses all core for itself and since mainly the vhost crypto service is affected, scope selected as Unchanged. Is there a concern on the selected scope metric? Thanks.
Thank you for the timely reply. With regard to CVE-2020-14377, the Scope metric was rated differently by NIST [1] hence my initial question. [1] https://nvd.nist.gov/vuln/detail/CVE-2020-14377
On Mon, Sep 28, 2020 at 5:43 PM Ferruh Yigit <ferruh.yigit () intel com> wrote:A set of vulnerabilities are fixed in DPDK: - CVE-2020-14374 - CVE-2020-14375 - CVE-2020-14376 - CVE-2020-14377 - CVE-2020-14378 Some downstream stakeholders were warned in advance in order to coordinate the release of fixes and reduce the vulnerability window. Problem: A malicious guest can harm the host using vhost crypto, this includes executing code in host (VM Escape), reading host application memory space to guest and causing partially denial of service in the host.
From the problem statement above I assume all these CVEs lead to some
kind of guest-to-host compromise, which usually implies a Scope change (or at least, this holds true for QEMU flaws). Therefore I was wondering what's the reason behind the different evaluation of the Scope metric between CVE-2020-14377 and the others. Regards. -- Mauro Matteo Cascella Red Hat Product Security PGP-Key ID: BB3410B0
Current thread:
- Re: DPDK security advisory for multiple vhost crypto issues Mauro Matteo Cascella (Jan 04)
- Re: [dpdk-dev] [oss-security] DPDK security advisory for multiple vhost crypto issues Ferruh Yigit (Jan 04)
- Re: [dpdk-dev] [oss-security] DPDK security advisory for multiple vhost crypto issues Mauro Matteo Cascella (Jan 04)
- Re: [dpdk-dev] [oss-security] DPDK security advisory for multiple vhost crypto issues Ferruh Yigit (Jan 04)