Advisories

Mandriva Advisories

Package name tightvnc Date April 4th, 2007 Advisory ID MDKSA-2007:080 Affected versions CS3.0, 2007.0, CS4.0 Synopsis Updated tightvnc packages fix integer overflow vulnerabilities

Problem Description

Local exploitation of a memory corruption vulnerability in the X.Org
and XFree86 X server could allow an attacker to execute arbitrary code
with privileges of the X server, typically root.

The vulnerability exists in the ProcXCMiscGetXIDList() function in the
XC-MISC extension. This request is used to determine what resource IDs
are available for use. This function contains two vulnerabilities,
both result in memory corruption of either the stack or heap. The
ALLOCATE_LOCAL() macro used by this function allocates memory on the
stack using alloca() on systems where alloca() is present, or using
the heap otherwise. The handler function takes a user provided value,
multiplies it, and then passes it to the above macro. This results in
both an integer overflow vulnerability, and an alloca() stack pointer
shifting vulnerability. Both can be exploited to execute arbitrary
code. (CVE-2007-1003)

iDefense reported two integer overflows in the way X.org handled
various font files. A malicious local user could exploit these issues
to potentially execute arbitrary code with the privileges of the X.org
server. (CVE-2007-1351, CVE-2007-1352)

TightVNC uses some of the same code base as Xorg, and has the same
vulnerable code.

Updated packages are patched to address these issues.

Updated Packages

Corporate Server 3.0

 65109fe6bab801e11e503b60b308643b  corporate/3.0/i586/tightvnc-1.2.9-2.2.C30mdk.i586.rpm
 3b08614f635cd9cf8b68d7c76d30b345  corporate/3.0/i586/tightvnc-doc-1.2.9-2.2.C30mdk.i586.rpm
 0e61567902f05149ac4f08e64953febf  corporate/3.0/i586/tightvnc-server-1.2.9-2.2.C30mdk.i586.rpm 
 e019fb72dce33e1dbf2e6f7a3bdcb384  corporate/3.0/SRPMS/tightvnc-1.2.9-2.2.C30mdk.src.rpm

Corporate Server 3.0/X86_64

 ef2e7129cf59e0dbdbf783ebbefb7e43  corporate/3.0/x86_64/tightvnc-1.2.9-2.2.C30mdk.x86_64.rpm
 cdd378ae7999c118a7dfafd0c67cc674  corporate/3.0/x86_64/tightvnc-doc-1.2.9-2.2.C30mdk.x86_64.rpm
 e30948128bc10c8aacc06694d986b1fa  corporate/3.0/x86_64/tightvnc-server-1.2.9-2.2.C30mdk.x86_64.rpm 
 e019fb72dce33e1dbf2e6f7a3bdcb384  corporate/3.0/SRPMS/tightvnc-1.2.9-2.2.C30mdk.src.rpm

Mandriva Linux 2007

 68955a65584a1c964141aa1d0e44f7e0  2007.0/i586/tightvnc-1.2.9-13.2mdv2007.0.i586.rpm
 9928944d22067747b5427a15ab59c853  2007.0/i586/tightvnc-doc-1.2.9-13.2mdv2007.0.i586.rpm
 9a6643c4c00c3d758a204e1b46969914  2007.0/i586/tightvnc-server-1.2.9-13.2mdv2007.0.i586.rpm 
 0a4abe1c964ed13e3d445efc0c1dd244  2007.0/SRPMS/tightvnc-1.2.9-13.2mdv2007.0.src.rpm

Mandriva Linux 2007/X86_64

 700ed069013c7cfef989263344e41dd0  2007.0/x86_64/tightvnc-1.2.9-13.2mdv2007.0.x86_64.rpm
 8a8c9a1721c9521d2224da5b73ddaf76  2007.0/x86_64/tightvnc-doc-1.2.9-13.2mdv2007.0.x86_64.rpm
 7a6402ace347731a1ae8722d80a75638  2007.0/x86_64/tightvnc-server-1.2.9-13.2mdv2007.0.x86_64.rpm 
 0a4abe1c964ed13e3d445efc0c1dd244  2007.0/SRPMS/tightvnc-1.2.9-13.2mdv2007.0.src.rpm

Corporate Server 4.0

 173bc482a466816a6b0c5a8b5568b8ef  corporate/4.0/i586/tightvnc-1.2.9-6.2.20060mlcs4.i586.rpm
 5b274d7ac4cd7758411ddbafc885209e  corporate/4.0/i586/tightvnc-doc-1.2.9-6.2.20060mlcs4.i586.rpm
 41fe3f9509d09eaa69f915afb348fee0  corporate/4.0/i586/tightvnc-server-1.2.9-6.2.20060mlcs4.i586.rpm 
 2651d5941592eba01e6acf47382d9cae  corporate/4.0/SRPMS/tightvnc-1.2.9-6.2.20060mlcs4.src.rpm

Corporate Server 4.0/X86_64

 e1aef1895d0bbbc24690e778ec848d74  corporate/4.0/x86_64/tightvnc-1.2.9-6.2.20060mlcs4.x86_64.rpm
 54537c7aa36eff300a96daac296af9ed  corporate/4.0/x86_64/tightvnc-doc-1.2.9-6.2.20060mlcs4.x86_64.rpm
 342dc521a4cf33fdf775f0c13191a552  corporate/4.0/x86_64/tightvnc-server-1.2.9-6.2.20060mlcs4.x86_64.rpm 
 2651d5941592eba01e6acf47382d9cae  corporate/4.0/SRPMS/tightvnc-1.2.9-6.2.20060mlcs4.src.rpm

References

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1003
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1351
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1352

Upgrade

To upgrade automatically, use MandrivaUpdate.

Verification

Please verify the update prior to upgrading to ensure the integrity of the downloaded package. You can do this with the command :

                rpm --checksig package.rpm
                

You can get the GPG public key of the Mandriva Security Team to verify the GPG signature of each RPM.

If you use MandrivaUpdate, the verification of md5 checksum and GPG signature is performed automatically for you.