ESB-2018.2135 - [Win][Mac] Atlassian Sourcetree: Execute arbitrary code/commands - Remote with user interaction 2018-07-24

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.2135
    Sourcetree - Remote Code Execution vulnerabilities - CVE-2018-11235
                               24 July 2018

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:          Atlassian Sourcetree
Publisher:        Atlassian
Operating System: Mac OS
                  Windows
Impact/Access:    Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution:       Patch/Upgrade
CVE Names:        CVE-2018-13386 CVE-2018-13385 CVE-2018-11235

Reference:        ESB-2018.1827
                  ESB-2018.1763
                  ESB-2018.1704
                  ESB-2018.1614

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This email refers to the advisory found at
https://confluence.atlassian.com/sourcetreekb/sourcetree-security-advisory-2018-07-18-953674465.html
.


CVE ID:

* CVE-2018-11235.
* CVE-2018-13385.
* CVE-2018-13386.


Product: Sourcetree.

Affected Sourcetree product versions:

* for macOS, 1.0b2 <= version < 2.7.6
* for Windows, 0.5.1.0 <= version < 2.6.10


Fixed Sourcetree product versions:

* for macOS, Sourcetree 2.7.6 has been released with a fix for these issues.
* for Windows, Sourcetree 2.6.10 has been released with a fix for these issues.


Summary:
This advisory discloses critical severity security vulnerabilities. Versions of
Sourcetree are affected by these vulnerabilities.



Customers who have upgraded Sourcetree to version 2.7.6 (Sourcetree for macOS)
or 2.6.10 (Sourcetree for Windows) are not affected.

Customers who have downloaded and installed Sourcetree >= 1.0b2 but less than
2.7.6 (the fixed version for macOS) or who have downloaded and installed
Sourcetree >= 0.5.1.0 but less than 2.6.10 (the fixed version for
Windows) please
upgrade your Sourcetree installations immediately to fix these vulnerabilities.



Sourcetree for macOS - Git submodules vulnerability (CVE-2018-11235)

Severity:
Atlassian rates the severity level of this vulnerability as critical, according
to the scale published in our Atlassian severity levels. The scale allows us to
rank the severity as critical, high, moderate or low.
This is our assessment and you should evaluate its applicability to your own IT
environment.


Description:

The embedded version of Git used in Sourcetree for macOS was vulnerable to
CVE-2018-11235. An attacker can exploit this issue if they can commit to a Git
repository linked in Sourcetree for macOS or that has been recursively cloned or
if a user interacts with a submodule. This allows them to execute arbitrary code
on systems running a vulnerable version of Sourcetree for macOS.
Versions of Sourcetree for macOS starting with version 1.02b before version
2.7.4 are affected by this vulnerability. This issue can be tracked at:
https://jira.atlassian.com/browse/SRCTREE-5845 .

Sourcetree for Windows - Git submodules vulnerability (CVE-2018-11235)

Severity:
Atlassian rates the severity level of this vulnerability as critical, according
to the scale published in our Atlassian severity levels. The scale allows us to
rank the severity as critical, high, moderate or low.
This is our assessment and you should evaluate its applicability to your own IT
environment.


Description:

The embedded version of Git used in Sourcetree for Windows was vulnerable to
CVE-2018-11235. An attacker can exploit this issue if they can commit to a Git
repository linked in Sourcetree for Windows or that has been recursively cloned
or if a user interacts with a submodule. This allows them to execute arbitrary
code on systems running a vulnerable version of Sourcetree for Windows.
Versions of Sourcetree for Windows starting with version 0.5.1.0 before version
2.6.10 are affected by this vulnerability. This issue can be tracked at:
https://jira.atlassian.com/browse/SRCTREEWIN-8882 .

Sourcetree for macOS - Argument injection via Mercurial repository filenames
(CVE-2018-13385)

Severity:
Atlassian rates the severity level of this vulnerability as critical, according
to the scale published in our Atlassian severity levels. The scale allows us to
rank the severity as critical, high, moderate or low.
This is our assessment and you should evaluate its applicability to your own IT
environment.


Description:

There was an argument injection vulnerability in Sourcetree for macOS via
filenames in Mercurial repositories. An attacker with permission to commit to a
Mercurial repository linked in Sourcetree for macOS is able to exploit this
issue to gain code execution on the system.
Versions of Sourcetree for macOS before version 2.7.6 are affected by this
vulnerability. This issue can be tracked at:
https://jira.atlassian.com/browse/SRCTREE-5846 .

Sourcetree for Windows - Argument injection via Mercurial repository filenames
(CVE-2018-13386)

Severity:
Atlassian rates the severity level of this vulnerability as critical, according
to the scale published in our Atlassian severity levels. The scale allows us to
rank the severity as critical, high, moderate or low.
This is our assessment and you should evaluate its applicability to your own IT
environment.


Description:

There was an argument injection vulnerability in Sourcetree for Windows via
filenames in Mercurial repositories. An attacker with permission to commit to a
Mercurial repository linked in Sourcetree for Windows is able to exploit this
issue to gain code execution on the system.
Versions of Sourcetree for Windows before version 2.6.10 are affected by this
vulnerability. This issue can be tracked at:
https://jira.atlassian.com/browse/SRCTREEWIN-8884 .



Fix:

To address these issues, we've released the following versions containing a
fix:

* Sourcetree for macOS version 2.7.6
* Sourcetree for Windows version 2.6.10

Remediation:

Upgrade Sourcetree for Windows to version 2.6.10 or higher.

The vulnerabilities and fix versions are described above. If affected, you
should upgrade to the latest version immediately.

If you are running Sourcetree macOS and cannot upgrade to 2.6.10 (Sourcetree for
Windows), upgrade to version 2.7.6.


For a full description of the latest version of Sourcetree, see the release
notes found at https://www.sourcetreeapp.com/update/releasenotes/2.7.6.html.
You can download the latest version of Sourcetree from the download centre
found at https://www.sourcetreeapp.com/.

Acknowledgements:
Atlassian would like to credit Etienne Stalmans and Terry Zhang at Tophant for
reporting these issues to us.
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