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Date: Sun, 17 Dec 2017 12:02:21 -0500
From: Brian Fox <brianf@...atype.com>
To: Stefano Brivio <sbrivio@...hat.com>
Cc: Raphael Geissert <atomo64@...il.com>, oss-security@...ts.openwall.com, 
	Security <security@...atype.com>
Subject: Re: Sonatype Nexus Repository Manager
 2.x weak password encryption

Stefano, Thanks for the notification. Let us do an investigation and then
we'll follow up with next steps.

On Sun, Dec 17, 2017 at 9:17 AM, Stefano Brivio <sbrivio@...hat.com> 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/PasswordHelper.java[3]
> > - components/nexus-security/src/main/java/org/sonatype/
> security/configuration/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.
> > 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.
>
> > [0] https://help.sonatype.com/display/NXRM2/2017+Release+Notes
> > [1] https://github.com/sonatype/nexus-public/blob/nexus-2.x/
> components/nexus-ldap-common/src/main/java/org/sonatype/
> security/ldap/upgrade/cipher/DefaultPlexusCipher.java#L64
> > [2] https://github.com/sonatype/nexus-public/blob/nexus-2.x/
> components/nexus-ldap-common/src/main/java/org/sonatype/
> security/ldap/realms/persist/DefaultPasswordHelper.java
> > [3] https://github.com/sonatype/nexus-public/blob/nexus-2.x/
> components/nexus-core/src/main/java/org/sonatype/nexus/
> configuration/PasswordHelper.java
> > [4] https://github.com/sonatype/nexus-public/blob/nexus-2.x/
> components/nexus-security/src/main/java/org/sonatype/
> security/configuration/source/PasswordHelper.java
> >
> > Cheers,
>
> --
> Stefano
>

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