I've just deployed Mac 2.0.4 which has updated embedded version of Git and Mercurial to address CVE-2014-9390.
The Windows version will follow shortly and in the meantime you can use a system Git/Mercurial version.
EDIT: Windows version 1.6.12 [released] addresses CVE-2014-9390.
Update: please read the blog post for instructions to update the embedded Git/Mercurial versions in SourceTree for Windows. https://blog.sourcetreeapp.com/2014/12/18/atlassian-update-for-git-and-mercurial-vulnerability/
There is a Blog entry, stating to switch from embedded GIT to System GIT... However, neither for Mac nor for Windows there is an uptodate command line package available (see http://git-scm.com/download/mac and http://git-scm.com/download/mac).
One workaround I found, is to install the GitHub client (https://mac.github.com/, https://windows.github.com/) and let SourceTree use the git commandline from GitHub. But this does not work (error message: fatal: Unable to find remote helper for 'http'), or compile GIT from the sources.
Atlassian should come up asap with an update for SourceTree!
My experience on MAC was that when I told SourceTree to use System Git, it offered to install "Apple Git". I took that option, "Apple Git" installed itself, and SourceTree since then has been pointing to that version of git, as shown below:
RdgJrMacBookPro:SourceTreeTest1 rdg$ cd /usr/bin
RdgJrMacBookPro:bin rdg$ ls -lsa git
8 -rwxr-xr-x 1 root wheel 14160 Sep 26 22:06 git
RdgJrMacBookPro:bin rdg$ git --version
git version 1.9.3 (Apple Git-50)
RdgJrMacBookPro:bin rdg$ pwd
In the case of Win7, I also run SourceTree on Win7 via bootcamp. Over there, I had already installed git before I installed SourceTree. I think it was "msysgit". Anywhere, it was a simple matter of pointing SourceTree to the location of "git" in that prior installation, to use instead of SourceTree's internal git.
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