ID

VAR-200902-0476

CVE

CVE-2009-0141

TITLE

Apple Mac OS  of  XTerm  writable vulnerability in

DESCRIPTION

XTerm in Apple Mac OS X 10.4.11 and 10.5.6, when used with luit, creates tty devices with insecure world-writable permissions, which allows local users to write to the Xterm of another user. The security update addresses new vulnerabilities that affect the AFP server, movie playing, Resource Manager, Certificate Assistant, CoreText, 'dscl', Folder Manager, FSEvents, csregprinter, Remote Apple Event Viewer, Safari, Xterm, and SMB components of Mac OS X. The advisory also contains security updates for 32 previously reported issues. Local attackers may exploit this issue to gain elevated privileges; other attacks may also be possible. This issue affects Mac OS X 10.4.11 and 10.5.6. Other distributions that include XTerm and Luit may also be vulnerable, but this has not been confirmed. NOTE: This issue was previously covered in BID 33759 (Apple Mac OS X 2009-001 Multiple Security Vulnerabilities), but has been assigned its own record to better document it. 1) A race condition error in the AFP Server can be exploited to trigger the execution of an infinite loop by sending a specially crafted file enumeration request. 2) An error in the handling of movie files using the Pixlet codec can be exploited to trigger a memory corruption. 3) An error in the Resource Manager related to CarbonCore can be exploited to trigger a memory corruption via a file containing a specially crafted resource fork. Successful exploitation of vulnerabilities #2 and #3 may allow execution of arbitrary code. 4) Certificate Assistant handles temporary files in an insecure manner. This can be exploited to overwrite arbitrary files with the privileges of the user running the application. 5) Two errors in ClamAV can be exploited to cause a crash or potentially execute arbitrary code. For more information: SA32663 SA32926 6) An error in CoreText when processing specially crafted Unicode strings can be exploited to cause a heap-based buffer overflow via e.g. a specially crafted web page. Successful exploitation of this vulnerability may allow execution of arbitrary code. 7) The dscl program accepts passwords passed via command line arguments. This can be exploited by local users to obtain the received passwords via the process list. 8) Multiple errors in fetchmail can be exploited by malicious people to cause a crash via overly large e-mail headers. For more information: SA30742 9) Folder Manager creates the "Downloads" folder with global read permissions after a user deletes it. This can be exploited by unprivileged local users to gain access to the "Downloads" folder. 10) An error in the fseventsd program can be exploited to disclose normally restricted filesystem activity via the FSEvents framework. 11) An error in perl when processing Unicode characters can be exploited to trigger a memory corruption and potentially execute arbitrary code. This is related to: SA27546 12) An error handling problem in csregprinter can be exploited to cause a heap-based buffer overflow and potentially gain system privileges. 13) Multiple errors in python have an unknown impact or can be exploited to cause a crash or potentially compromise a vulnerable system. For more information: SA26837 SA31305 14) An uninitialized memory access error in the Remote Apple events server can be exploited to disclose potentially sensitive memory contents via specially crafted Remote Apple events. 15) An error in Server Manager while validating authentication credentials can be exploited to alter the system configuration. 16) An integer overflow in the SMB implementation can be exploited to cause a heap-based buffer overflow by tricking a user into connecting to a malicious SMB server. Successful exploitation of this vulnerability may allow execution of arbitrary code. 17) An error in the SMB implementation can be exploited to exhaust available memory resources and cause a system shutdown by tricking a user into connecting to a malicious SMB server. 18) An error in SquirrelMail can be exploited to inject and execute arbitrary HTML and script code via a specially crafted email. For more information: SA32143 19) Multiple errors in the X11 server can be exploited by malicious, local users to cause a DoS, disclose potentially sensitive information, or gain escalated privileges. For more information: SA30627 20) Multiple errors in FreeType can be exploited to cause a DoS or compromise an application using the library. For more information: SA20100 SA24768 SA30600 21) Multiple errors in LibX11 can be exploited by malicious, local users to disclose sensitive information, cause a DoS, and gain escalated privileges. This can be exploited to e.g. write data to another user's Xterm. SOLUTION: Apply Apple Security Update 2009-001. http://www.apple.com/support/downloads/ PROVIDED AND/OR DISCOVERED BY: The vendor credits: 6) Rosyna of Unsanity 9) Graham Perrin of CENTRIM, University of Brighton 10) Mark Dalrymple 12) Lars Haulin ORIGINAL ADVISORY: http://support.apple.com/kb/HT3438 OTHER REFERENCES: SA20100: http://secunia.com/advisories/20100/ SA24741: http://secunia.com/advisories/24741/ SA24768: http://secunia.com/advisories/24768/ SA26837: http://secunia.com/advisories/26837/ SA27546: http://secunia.com/advisories/27546/ SA30600: http://secunia.com/advisories/30600/ SA30627: http://secunia.com/advisories/30627/ SA30742: http://secunia.com/advisories/30742/ SA31305: http://secunia.com/advisories/31305/ SA32143: http://secunia.com/advisories/32143/ SA32663: http://secunia.com/advisories/32663/ SA32926: http://secunia.com/advisories/32926/ ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities. 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AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

local

TYPE

permissions and access control

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Graham PerrinClint RuohoBilly Rios

SOURCES

LAST UPDATE DATE

2025-04-10T22:28:53.011000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE