Barracuda WAF V360 Firmware 8.0.1.014 Credential Disclosure

Firmware reversing of the Barracuda Web Application Firewall uncovered development artifacts that should have been removed on the production images. Once the encryption scheme was broken, many QA and development tools were discovered on the affected partitions. Some of these contained sensitive information such as authentication credentials used by internal developers. Firmware version 8.0.1.014 is affected.


MD5 | 294601501b6c14d834d8d86848392759

KL-001-2017-011 : Barracuda WAF Internal Development Credential Disclosure

Title: Barracuda WAF Internal Development Credential Disclosure
Advisory ID: KL-001-2017-011
Publication Date: 2017.07.06
Publication URL: https://www.korelogic.com/Resources/Advisories/KL-001-2017-011.txt


1. Vulnerability Details

Affected Vendor: Barracuda
Affected Product: Web Application Firewall V360
Affected Version: Firmware v8.0.1.014
Platform: Embedded Linux
CWE Classification: CWE-489: Leftover Debug Code, CWE-200: Information Exposure
Impact: Privileged Access
Attack vector: Code Review

2. Vulnerability Description

Firmware reversing of the Barracuda Web Application Firewall
uncovered development artifacts that should have been removed
on the production images. Once the encryption scheme was broken,
many QA and development tools were discovered on the affected
partitions. Some of these contained sensitive information such
as authentication credentials used by internal developers.

3. Technical Description

root@(none):/realroot/root# grep -ri "bospw" *|more
newfile/lib/Stub.pm: 'BOSPW' => undef,
newfile/lib/Stub.pm: my $bospw = $self->_retrieve_bos_pw();
newfile/lib/Stub.pm: $self->_set_BOSPW($bospw);
newfile/lib/Stub.pm: my $bospw = Postbuild::get_bos_pw();
newfile/lib/Stub.pm: my $url =
"https://$bospw\@ops.barracudanetworks.com:443/cgi-old/createserialkey.cgi?model=$tmpmodel&date=$date&mac=$tmpMAC&revision=$tmprevision&hw=$tmphw&devel=$devel&vm=$vm&
platform=$platform&buildkey=$bdvers";
newfile/lib/Stub.pm: $bospw = Postbuild::get_bos_pw();
newfile/lib/Stub.pm: $url =
"https://$bospw\@ops.barracudanetworks.com:443/cgi-old/createserialkey.cgi?model=$tmpmodel&date=$date&mac=$tmpMAC&revision=$tmprevision&hw=$tmphw&devel=$devel&vm=$vm
&platform=$platform&dest_country=$ship_code&buildkey=$bdvers";
newfile/lib/Stub.pm: my $bospw;
newfile/lib/Stub.pm: if ( -f "/root/bospw" ) {
newfile/lib/Stub.pm: open IN, "/root/bospw";
newfile/lib/Stub.pm: $bospw = <IN>;
newfile/lib/Stub.pm: chomp($bospw);
newfile/lib/Stub.pm: $bospw = "manufacturing:N3rfH3rders";
newfile/lib/Stub.pm: return $bospw;
newfile/lib/Stub.pm:sub _get_BOSPW() {
newfile/lib/Stub.pm: return $self->{'BOSPW'};
newfile/lib/Stub.pm:sub _set_BOSPW() {
newfile/lib/Stub.pm: my ($self, $BOSPW) = @_;
newfile/lib/Stub.pm: $self->{'BOSPW'} = $BOSPW;
newfile/lib/Postbuild.pm: my $bospw = "manufacturing:N3rfH3rders";
newfile/lib/Postbuild.pm: if( -f "/root/bospw" ) {
newfile/lib/Postbuild.pm: open IN, "/root/bospw";
newfile/lib/Postbuild.pm: $bospw = <IN>;
newfile/lib/Postbuild.pm: chomp($bospw);
newfile/lib/Postbuild.pm: return $bospw;
newfile/lib/Postbuild.pm: my $bospw = get_bos_pw();
newfile/lib/Postbuild.pm: my $url =
"https://$bospw\@ops.barracuda.com:443/cgi-old/createserialkey.cgi?model=$tmpmodel&date=$date&mac=$tmpMAC&revision=$tmprevision&hw=$tmphw&devel=$devel&vm=$vm&pl
atform=$platform&bdvers=$bdvers";
newfile/lib/Postbuild.pm: $url =
"https://$bospw\@ops.barracuda.com:443/cgi-old/createserialkey.cgi?model=$tmpmodel&date=$date&mac=$tmpMAC&revision=$tmprevision&hw=$tmphw&devel=$devel&vm=$
vm&platform=$platform&dest_country=$ship_code&bdvers=$bdvers";
newfile/lib/Postbuild.pm: my $bospw = get_bos_pw();
newfile/lib/Postbuild.pm: my $url =
"https://$bospw\@ops.barracudanetworks.com:443/~order/prod_void.cgi?void_serial=$serial";
postbuild-code-platform-2.tar.gz.integrit:!/root/bospw
qaclear: unlink("/root/bospw");
qaclear.2:unlink("/root/bospw");
qapass:my @bospw = ("manufacturing:N3rfH3rders");
qapass:my $extrabospw = injectAndGet("__METHOD__://__POSTBUILDIP__/postbuild/files/os_updates2/root/bospw", {
METHOD => [ "http", "https" ], POSTBUILDIP => [ "mfg-postbuild.englab.cudanet.local" ] }, 10
);
qapass:if( defined($extrabospw) ) {
qapass: unshift @bospw, split(/\n/, $extrabospw);
qapass: $url = "https://__BOSPW__\@__BOSIP__/~order/prod_accept.cgi?serial=$serial&wh=$warehouse&firmware=$firmware"
qapass: $url = "https://__BOSPW__\@__BOSIP__/~order/prod_accept.cgi?serial=$serial&firmware=$firmware";
qapass:if (!defined(injectAndGet($url, { BOSPW => \@bospw, BOSIP => \@bosip } ))) {
qapass:$url = "https://__BOSPW__\@__BOSIP__/cgi-bin/get_serial_status.cgi?serial=$serial";
qapass:my $content = injectAndGet($url, { BOSPW => \@bospw, BOSIP => \@bosip } );
qapass:$url =
"https://__BOSPW__\@__BOSIP__/cgi-bin/shipping.cgi?option=qadocs&xlist=1&box_label=1&printer_loc=manufacturing&submit=Print&serial_id=$serial&override=$serial$loc_string";
qapass: $url =
"https://__BOSPW__\@__BOSIP__/cgi-bin/shipping.cgi?option=qadocs&xlist=1&box_label=1&link_code=1&printer_loc=manufacturing&submit=Print&serial_id=$serial&override=$serial$loc_string";
qapass:if( !defined(injectAndGet($url, { BOSPW => \@bospw, BOSIP => \@bosip })) ) {
qapass:$url =
"https://__BOSPW__\@__BOSIP__/cgi-bin/shipping.cgi?option=qadocs&serial_label=1&printer_loc=manufacturing&submit=Print&serial_id=$serial&override=$serial$loc_string";
qapass:if( !defined(injectAndGet($url, { BOSPW => \@bospw, BOSIP => \@bosip })) ) {


4. Mitigation and Remediation Recommendation

The vendor has patched this vulnerability in the lastest
virtual appliance release.

5. Credit

This vulnerability was discovered by Matt Bergin (@thatguylevel)
of KoreLogic, Inc. and Joshua Hardin.

6. Disclosure Timeline

2016.12.20 - KoreLogic sends vulnerability report and PoC to
Barracuda.
2016.12.21 - Barracuda acknowledges receipt of the vulnerability
report.
2017.01.09 - Barracuda informs KoreLogic that they are working
on remediation for this issue.
2017.01.26 - Barracuda asks for additional time beyond the
standard 45 business day embargo to address this
and other issues reported by KoreLogic.
2017.02.27 - 45 business days have elapsed since the issue was
reported.
2017.04.10 - 75 business days have elapsed since the issue was
reported.
2017.05.15 - 100 business days have elapsed since the issue was
reported.
2017.05.24 - Barracuda updates KoreLogic on the status of the
remediation efforts.
2017.06.13 - 120 business days have elapsed since the issue was
reported.
2017.06.27 - Barracuda informs KoreLogic that the issue has
been fixed in the latest release of the WAF
virtual appliance.
2017.07.06 - KoreLogic public disclosure.

7. Proof of Concept

See 3. Technical Description


The contents of this advisory are copyright(c) 2017
KoreLogic, Inc. and are licensed under a Creative Commons
Attribution Share-Alike 4.0 (United States) License:
http://creativecommons.org/licenses/by-sa/4.0/

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proven track record of providing security services to entities
ranging from Fortune 500 to small and mid-sized companies. We
are a highly skilled team of senior security consultants doing
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tools and resources aimed at helping the security community.
https://www.korelogic.com/about-korelogic.html

Our public vulnerability disclosure policy is available at:
https://www.korelogic.com/KoreLogic-Public-Vulnerability-Disclosure-Policy.v2.2.txt


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