[Bug 1404035] [NEW] Errors in handling case-sensitive directories allow for remote code execution on pull

[Luke Faraone]

*** This bug is a security vulnerability ***

Public security bug reported:

>From the upstream announcement[1]:


This is a security-fix for CVE-2014-9390, which affects users on
Windows and Mac OS X but not typical UNIX users.  A set of new
releases for older maintenance tracks (v1.8.5.6, v1.9.5, v2.0.5, and
v2.1.4) are published at the same time and they contain the same fix.
Various implementations and ports, including Git for Windows, Git OS
X installer, JGit & EGit, libgit2 (and Visual Studio which uses it)
have been updated at the same time.

Even though the issue may not affect Linux users, if you are a
hosting service whose users may fetch from your service to Windows
or Mac OS X machines, you are strongly encouraged to update to
protect such users who use existing versions of Git.

This issue also affects hg[2].

[1]: http://article.gmane.org/gmane.linux.kernel/1853266
[2]: http://mercurial.selenic.com/wiki/WhatsNew#Mercurial_3.2.3_.282014-12-18.29

** Affects: git (Ubuntu)
     Importance: High
         Status: New

** Affects: mercurial (Ubuntu)
     Importance: High
         Status: New

** Changed in: git (Ubuntu)
   Importance: Undecided => High

** Information type changed from Public to Public Security

** Also affects: mercurial (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: mercurial (Ubuntu)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1404035

Title:
  Errors in handling case-sensitive directories allow for remote code
  execution on pull

Status in git package in Ubuntu:
  New
Status in mercurial package in Ubuntu:
  New

Bug description:
  From the upstream announcement[1]:

  
  This is a security-fix for CVE-2014-9390, which affects users on
  Windows and Mac OS X but not typical UNIX users.  A set of new
  releases for older maintenance tracks (v1.8.5.6, v1.9.5, v2.0.5, and
  v2.1.4) are published at the same time and they contain the same fix.
  Various implementations and ports, including Git for Windows, Git OS
  X installer, JGit & EGit, libgit2 (and Visual Studio which uses it)
  have been updated at the same time.

  Even though the issue may not affect Linux users, if you are a
  hosting service whose users may fetch from your service to Windows
  or Mac OS X machines, you are strongly encouraged to update to
  protect such users who use existing versions of Git.

  This issue also affects hg[2].

  [1]: http://article.gmane.org/gmane.linux.kernel/1853266
  [2]: http://mercurial.selenic.com/wiki/WhatsNew#Mercurial_3.2.3_.282014-12-18.29

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