oss-sec mailing list archives
Re: CVE for Kali Linux
From: "David A. Wheeler" <dwheeler () dwheeler com>
Date: Sun, 22 Mar 2015 23:08:57 -0400 (EDT)
On Sun, 22 Mar 2015 17:34:29 -0700, Russ Allbery <eagle () eyrie org> wrote:
Debian signs the entire repository state, not each individual package. This has its pluses and minuses.... Basically, the signing algorithm for a Debian repository rolls up all the hashes for each individual package in the archive and signs the whole thing...
Cygwin takes the same approach. It distributes a file listing packages (including their names, cryptographic hashes, and lengths), and this file list is signed. The Cygwin package manager downloads actual packages from untrusted locations, but before installing it, it checks if the package hash and length match the digitally-signed values (using a public key embedded in the package manager's executable). Currently Cygwin uses MD5 as its cryptographic hash algorithm, which has been totally busted as a crypto hash algorithm. Yes, Cygwin also checks the length, but I think using MD5 in 2015 is absurd. Thankfully, the Cygwin folks are already in the process of moving to SHA-512; once that move completes, they should be much stronger against MITM attacks. --- David A. Wheeler
Current thread:
- Re: CVE for Kali Linux, (continued)
- Re: CVE for Kali Linux Jeremy Stanley (Mar 22)
- Re: CVE for Kali Linux David A. Wheeler (Mar 22)
- Re: CVE for Kali Linux Daniel Micay (Mar 22)
- Re: CVE for Kali Linux Stephen Kitt (Mar 22)
- Re: CVE for Kali Linux Daniel Micay (Mar 22)
- Re: CVE for Kali Linux Alexander Cherepanov (Mar 22)
- Re: CVE for Kali Linux Alexander Cherepanov (Mar 22)
- Re: CVE for Kali Linux Russ Allbery (Mar 22)
- Re: CVE for Kali Linux Solar Designer (Mar 22)
- Re: CVE for Kali Linux Russ Allbery (Mar 22)
- Re: CVE for Kali Linux David A. Wheeler (Mar 22)
- Re: CVE for Kali Linux Alexander Cherepanov (Mar 23)
- Re: CVE for Kali Linux Alexander Cherepanov (Mar 23)
- Re: CVE for Kali Linux Marcus Meissner (Mar 23)
- Re: CVE for Kali Linux Alexander Cherepanov (Mar 23)
- Re: CVE for Kali Linux Marcus Meissner (Mar 23)
- Re: CVE for Kali Linux Marcus Meissner (Mar 24)
- Re: CVE for Kali Linux Alexander Cherepanov (Mar 24)
- Re: CVE for Kali Linux Kurt Seifried (Mar 22)