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Date: Sun, 17 Dec 2017 16:12:55 -0500
From: Brian Fox <brianf@...atype.com>
To: Raphael Geissert <atomo64@...il.com>
Cc: Stefano Brivio <sbrivio@...hat.com>,
Open Source Security <oss-security@...ts.openwall.com>, Security <security@...atype.com>
Subject: Re: [security] Re: Sonatype Nexus Repository Manager
2.x weak password encryption
I don't think this is very kosher to go and file a public ticket before
even contacting us.
On Sun, Dec 17, 2017 at 3:03 PM, Raphael Geissert <atomo64@...il.com> wrote:
> 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 [0] (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[1]
> > > - it using a hard-coded and weak password[2]
> > >
> > > 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[3] -
> > > components/nexus-security/src/main/java/org/sonatype/
> security/configurati
> > > on/source/PasswordHelper.java[4]
> > >
> > > 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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