Red Hat Bugzilla – Bug 770777
CVE-2011-1493 CVE-2011-4913 CVE-2011-4914 kernel: multiple issues in rose protocol
Last modified: 2015-07-31 02:46:55 EDT
"When parsing the FAC_NATIONAL_DIGIS facilities field, it's possible for a remote host to provide more digipeaters than expected, resulting in heap corruption. Check against ROSE_MAX_DIGIS to prevent overflows, and abort facilities parsing on failure. Additionally, when parsing the FAC_CCITT_DEST_NSAP and FAC_CCITT_SRC_NSAP facilities fields, a remote host can provide a length of less than 10, resulting in an underflow in a memcpy size, causing a kernel panic due to massive heap corruption. A length of greater than 20 results in a stack overflow of the callsign array. Abort facilities parsing on these invalid length values." These issues may both result in code execution. They may be triggered by a remote attacker if the victim has a listening ROSE socket, or by a local attacker (for privilege escalation) if a ROSE device exists (e.g. rose0). Ben Hutchings followed up with a patch [2] that resolves a number of other ROSE issues related to lack of size field validation, some of which may also result in heap corruption. [1] http://marc.info/?l=linux-netdev&m=130060344616926 [2] http://marc.info/?l=linux-netdev&m=130063972406389&w=2 Acknowledgements: Red Hat would like to thank Dan Rosenberg for reporting this issue.
Created kernel tracking bugs for this issue Affects: fedora-all [bug 770778]
Statement CVE-2011-1493: Not vulnerable. This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4, 5, 6, or Red Hat Enterprise MRG. Red Hat does not provide support for the ROSE protocol. Statement CVE-2011-4913: Not vulnerable. This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4, 5, 6, or Red Hat Enterprise MRG. Red Hat does not provide support for the ROSE protocol. Statement CVE-2011-4914: Not vulnerable. This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4, 5, 6, or Red Hat Enterprise MRG. Red Hat does not provide support for the ROSE protocol.