Date: Sun, 17 Dec 2017 21:03:38 +0100 From: Raphael Geissert <atomo64@...il.com> To: Stefano Brivio <sbrivio@...hat.com> Cc: Open Source Security <oss-security@...ts.openwall.com>, security@...atype.com Subject: Re: Sonatype Nexus Repository Manager 2.x weak password encryption Hi, On Sunday, 17 December 2017 15:17:45 CET Stefano Brivio wrote: > On Sun, 17 Dec 2017 13:53:47 +0100 > > Raphael Geissert <atomo64@...il.com> wrote: > > Hi, > > > > The Nexus Repository Manager in at least version 2.14.5  (latest of > > the 2.x series), stores the LDAP bind password in an on-disk file > > using PBE (bouncy castle's implementation of PBEWithSHAAnd128BitRC4). > > > > This is all great except for: > > - it using only 23 iterations > > - it using a hard-coded and weak password > > > > Therefore offering as much protection as a rot13 would. > > > > Given that the same PasswordHelper containing the weak password is > > present elsewhere in the code, it is very likely that this weak crypto > > issue affects other passwords stored by Nexus: > > > > - > > components/nexus-core/src/main/java/org/sonatype/nexus/configuration/Pass > > wordHelper.java - > > components/nexus-security/src/main/java/org/sonatype/security/configurati > > on/source/PasswordHelper.java > > > > It appears that this code is no longer used by the 3.x series. > > > > FWIW, the on-file password is: > > > > base64(SALT_SIZE || SALT || PBE_OUTPUT ) > > > > SALT_SIZE always being 8 (hard-coded). > > > > N.b. I'll be filing a CVE request in a moment. This is now CVE-2017-17717. > > N.b. I have not contacted sonatype. I couldn't find an email address. > > The page at https://www.sonatype.com/contactus says: > > 1. Send urgent or sensitive reports to security@...atype.com. > 2. Use our public key to keep your message safe. > 3. Provide us with a secure way to respond. > 4. We’ll get back to you as soon as we can. Usually within 24 hours. Oh, I somehow missed it. Thanks for the pointer and for copying it to sonatype. Cheers, -- Raphael Geissert
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