ESB-2018.3291 - [SUSE] libgit2: Multiple vulnerabilities 2018-10-26

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

                               ESB-2018.3291
             SUSE Security Update: Security update for libgit2
                              26 October 2018

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

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

Product:           libgit2
Publisher:         SUSE
Operating System:  SUSE
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Denial of Service               -- Remote/Unauthenticated      
                   Access Confidential Data        -- Remote/Unauthenticated      
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-15501 CVE-2018-11235 CVE-2018-10888
                   CVE-2018-10887 CVE-2018-8099 

Reference:         ESB-2018.2522
                   ESB-2018.2488

Original Bulletin: 
   https://www.suse.com/support/update/announcement/2018/suse-su-20183440-1/

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   SUSE Security Update: Security update for libgit2
______________________________________________________________________________

Announcement ID:    SUSE-SU-2018:3440-1
Rating:             moderate
References:         #1085256 #1095219 #1100612 #1100613 #1104641 
                    
Cross-References:   CVE-2018-10887 CVE-2018-10888 CVE-2018-11235
                    CVE-2018-15501 CVE-2018-8099
Affected Products:
                    SUSE Manager Server 3.2
                    SUSE Manager Server 3.1
                    SUSE Linux Enterprise Software Development Kit 12-SP3
______________________________________________________________________________

   An update that fixes 5 vulnerabilities is now available.

Description:

   This update for libgit2 fixes the following issues:

   - CVE-2018-8099: Fixed possible denial of service attack via different
     vectors by not being able to differentiate between these status codes
     (bsc#1085256).
   - CVE-2018-11235: With a crafted .gitmodules file, a malicious project can
     execute an arbitrary script on a machine that runs "git clone
     --recurse-submodules" because submodule "names" are obtained from this
     file, and then appended to $GIT_DIR/modules, leading to directory
     traversal with "../" in a name. Finally, post-checkout hooks from a
     submodule are executed, bypassing the intended design in which hooks are
     not obtained from a remote server.  (bsc#1095219)
   - CVE-2018-10887: It has been discovered that an unexpected sign extension
     in git_delta_apply function in delta.c file may have lead to an integer
     overflow which in turn leads to an out of bound read, allowing to read
     before the base object. An attacker could have used this flaw to leak
     memory addresses or cause a Denial of Service. (bsc#1100613)
   - CVE-2018-10888: A missing check in git_delta_apply function in delta.c
     file, may lead to an out-of-bound read while reading a binary delta
     file. An attacker may use this flaw to cause a Denial of Service.
     (bsc#1100612)
   - CVE-2018-15501: A remote attacker can send a crafted smart-protocol "ng"
     packet that lacks a '\0' byte to trigger an out-of-bounds read that
     leads to DoS.  (bsc#1104641)


Patch Instructions:

   To install this SUSE Security Update use the SUSE recommended installation methods
   like YaST online_update or "zypper patch".

   Alternatively you can run the command listed for your product:

   - SUSE Manager Server 3.2:

      zypper in -t patch SUSE-SUSE-Manager-Server-3.2-2018-2459=1

   - SUSE Manager Server 3.1:

      zypper in -t patch SUSE-SUSE-Manager-Server-3.1-2018-2459=1

   - SUSE Linux Enterprise Software Development Kit 12-SP3:

      zypper in -t patch SUSE-SLE-SDK-12-SP3-2018-2459=1



Package List:

   - SUSE Manager Server 3.2 (ppc64le s390x x86_64):

      libgit2-24-0.24.1-7.6.1
      libgit2-24-debuginfo-0.24.1-7.6.1
      libgit2-debugsource-0.24.1-7.6.1

   - SUSE Manager Server 3.1 (ppc64le s390x x86_64):

      libgit2-24-0.24.1-7.6.1
      libgit2-24-debuginfo-0.24.1-7.6.1
      libgit2-debugsource-0.24.1-7.6.1

   - SUSE Linux Enterprise Software Development Kit 12-SP3 (x86_64):

      libgit2-24-0.24.1-7.6.1
      libgit2-24-debuginfo-0.24.1-7.6.1
      libgit2-debugsource-0.24.1-7.6.1


References:

   https://www.suse.com/security/cve/CVE-2018-10887.html
   https://www.suse.com/security/cve/CVE-2018-10888.html
   https://www.suse.com/security/cve/CVE-2018-11235.html
   https://www.suse.com/security/cve/CVE-2018-15501.html
   https://www.suse.com/security/cve/CVE-2018-8099.html
   https://bugzilla.suse.com/1085256
   https://bugzilla.suse.com/1095219
   https://bugzilla.suse.com/1100612
   https://bugzilla.suse.com/1100613
   https://bugzilla.suse.com/1104641

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