Security Leftovers
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Security updates for Thursday
Security updates have been issued by Fedora (dotnet3.1, kernel, mbedtls, and python35), Mageia (libraw), openSUSE (mumble), SUSE (libsolv, libzypp, and perl-DBI), and Ubuntu (libdbi-perl, libphp-phpmailer, mcabber, ncmpc, openssl, openssl1.0, qemu, samba, storebackup, and util-linux).
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Russell Coker: Dell BIOS Updates
I have just updated the BIOS on a Dell PowerEdge T110 II. The process isn’t too difficult, Google for the machine name and BIOS, download a shell script encoded firmware image and GPG signature, then run the script on the system in question.
One problem is that the Dell GPG key isn’t signed by anyone. How hard would it be to get a few well connected people in the Linux community to sign the key used for signing Linux scripts for updating the BIOS? I would be surprised if Dell doesn’t employ a few people who are well connected in the Linux community, they should just ask all employees to sign such GPG keys! Failing that there are plenty of other options. I’d be happy to sign the Dell key if contacted by someone who can prove that they are a responsible person in Dell. If I could phone Dell corporate and ask for the engineering department and then have someone tell me the GPG fingerprint I’ll sign the key and that problem will be partially solved (my key is well connected but you need more than one signature).
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An inside look at CVE-2020-10713, a.k.a. the GRUB2 "BootHole"
As GRUB2 upstream maintainers, Oracle developers took the lead on both the disclosure coordination and the technical solutions. In their role as community maintainers for GRUB2, Daniel and Alexsandr were notified of the security vulnerability and immediately began analyzing the impact of these vulnerabilities, coordinating the cross-vendor industry response, and ensuring that this vulnerability would be fixed swiftly. In the end, this coordination effort would entail around 100 individuals from 18 companies.
CVE-2020-10713, the "BootHole" vulnerability, affects systems using UEFI Secure Boot signed operating systems and has a CVSS Base Score of 8.2.
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