[Mono-bugs] [Bug 647353] New: [PATCH] CVE-2010-3369: insecure library loading in files build/mdb{.in, -symbolreader.in}

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https://bugzilla.novell.com/show_bug.cgi?id=647353

https://bugzilla.novell.com/show_bug.cgi?id=647353#c0


           Summary: [PATCH] CVE-2010-3369: insecure library loading in
                    files build/mdb{.in,-symbolreader.in}
    Classification: Mono
           Product: Mono: Debugger
           Version: 2.6.x
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: Major
          Priority: P5 - None
         Component: cli
        AssignedTo: martin at novell.com
        ReportedBy: jari.aalto at cante.net
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---
           Blocker: ---


Created an attachment (id=395417)
 --> (http://bugzilla.novell.com/attachment.cgi?id=395417)
CVE-2010-3369 Security patch

User-Agent:       Opera/9.80 (X11; Linux x86_64; U; en) Presto/2.6.30
Version/10.62

>From http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=598299

Package: vdr-dbg
Version: 1.6.0-18
Severity: grave
Tags: security
User: team at security.debian.org
Usertags: ldpath

Hello,

During a review of the Debian archive, I've found your package to
contain a script that can be abused by an attacker to execute arbitrary
code.

The vulnerability is introduced by an insecure change to
LD_LIBRARY_PATH, and environment variable used by ld.so(8) to look for
libraries on a directory other than the standard paths.

Vulnerable code follows:

/usr/bin/vdrleaktest line 73:
LANG=C LD_LIBRARY_PATH="/usr/lib/debug;$LD_LIBRARY_PATH" \
   valgrind --tool=memcheck --leak-check=yes --num-callers=20 \
   --suppressions=/usr/share/vdr/valgrind.supp \
   /usr/bin/vdr-dbg -v $VIDEO_DIR -c $CFG_DIR -L $PLUGIN_DIR  -r $REC_CMD \
   -E $EPG_FILE -g /tmp $OPTIONS --port $SVDRP_PORT --lirc \
   "$@"

When there's an empty item on the colon-separated list of
LD_LIBRARY_PATH, ld.so treats it as '.' (i.e. CWD/$PWD.)
If the given script is executed from a directory where a potential,
local, attacker can write files to, there's a chance to exploit this
bug.

This vulnerability has been assigned the CVE id CVE-2010-3387. Please make sure
you mention it when forwarding this report to upstream and when fixing
this bug (everywhere: upstream and here at Debian.)

[0] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-3387
[1] http://security-tracker.debian.org/tracker/CVE-2010-3387

Sincerely,
Raphael Geissert

Reproducible: Always

Steps to Reproduce:
1. See above report
2.
3.
Actual Results:  
Security issue

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