CVE-2010-4075

Published: 29 November 2010

The uart_get_count function in drivers/serial/serial_core.c in the Linux kernel before 2.6.37-rc1 does not properly initialize a certain structure member, which allows local users to obtain potentially sensitive information from kernel stack memory via a TIOCGICOUNT ioctl call.

From the Ubuntu Security Team

Dan Rosenberg discovered that multiple terminal ioctls did not correctly initialize structure memory. A local attacker could exploit this to read portions of kernel stack memory, leading to a loss of privacy.

Notes

applied on dapper_linux-source-2.6.15 2.6.15-57.94, but not in
changelog

Status

References

• http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.37-rc1
• http://lkml.indiana.edu/hypermail//linux/kernel/1009.1/03388.html
• https://ubuntu.com/security/notices/USN-1089-1
• https://ubuntu.com/security/notices/USN-1090-1
• https://ubuntu.com/security/notices/USN-1092-1
• https://ubuntu.com/security/notices/USN-1093-1
• https://ubuntu.com/security/notices/USN-1105-1
• https://ubuntu.com/security/notices/USN-1086-1
• https://ubuntu.com/security/notices/USN-1187-1
• https://ubuntu.com/security/notices/USN-1202-1
• https://ubuntu.com/security/notices/USN-1204-1
• https://www.cve.org/CVERecord?id=CVE-2010-4075
• NVD
• Launchpad
• Debian

Bugs

• https://bugzilla.redhat.com/show_bug.cgi?id=648660