-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 _______________________________________________________________________ Mandriva Linux Security Advisory MDKSA-2007:080-1 http://www.mandriva.com/security/ _______________________________________________________________________ Package : tightvnc Date : April 10, 2007 Affected: 2007.1 _______________________________________________________________________ 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. Update: Packages for Mandriva Linux 2007.1 are now available. _______________________________________________________________________ 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 _______________________________________________________________________ Updated Packages: Mandriva Linux 2007.1: 9c14a56106984cd16780a1fd7e9c7beb 2007.1/i586/tightvnc-1.2.9-16.1mdv2007.1.i586.rpm 8aa3673bc8843dae12d9f18c4226214e 2007.1/i586/tightvnc-doc-1.2.9-16.1mdv2007.1.i586.rpm d78d10a879bc1b1c461f75b815dcd656 2007.1/i586/tightvnc-server-1.2.9-16.1mdv2007.1.i586.rpm 59e94b523bc078f3997f689dae0e22b5 2007.1/SRPMS/tightvnc-1.2.9-16.1mdv2007.1.src.rpm Mandriva Linux 2007.1/X86_64: 26e585c8ba950720c17ea4ce1373c05c 2007.1/x86_64/tightvnc-1.2.9-16.1mdv2007.1.x86_64.rpm 6f031ef92c5bec87488bba5861f0d41e 2007.1/x86_64/tightvnc-doc-1.2.9-16.1mdv2007.1.x86_64.rpm 205e13d0c46dc25bfa39c7dcfafe6dcb 2007.1/x86_64/tightvnc-server-1.2.9-16.1mdv2007.1.x86_64.rpm 59e94b523bc078f3997f689dae0e22b5 2007.1/SRPMS/tightvnc-1.2.9-16.1mdv2007.1.src.rpm _______________________________________________________________________ To upgrade automatically use MandrivaUpdate or urpmi. The verification of md5 checksums and GPG signatures is performed automatically for you. All packages are signed by Mandriva for security. You can obtain the GPG public key of the Mandriva Security Team by executing: gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98 You can view other update advisories for Mandriva Linux at: http://www.mandriva.com/security/advisories If you want to report vulnerabilities, please contact security_(at)_mandriva.com _______________________________________________________________________ Type Bits/KeyID Date User ID pub 1024D/22458A98 2000-07-10 Mandriva Security Team -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) iD8DBQFGG+ypmqjQ0CJFipgRAkVGAKDU/Gvf1lxdrBW8R+e80BqmE4fIBQCgnQQ6 nGHrE1CatxZlZ3wasfF2stA= =vO/P -----END PGP SIGNATURE----- _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/