CVE-2014-2851

Published: 14 April 2014

Integer overflow in the ping_init_sock function in net/ipv4/ping.c in the Linux kernel through 3.14.1 allows local users to cause a denial of service (use-after-free and system crash) or possibly gain privileges via a crafted application that leverages an improperly managed reference counter.

From the Ubuntu security team

A flaw was discovered in the Linux kernel's ping sockets. An unprivileged local user could exploit this flaw to cause a denial of service (system crash) or possibly gain privileges via a crafted application.

Notes

android kernels (goldfish, grouper, maguro, mako and manta) are not
supported on the Ubuntu Touch 13.10 preview kernels

android init writes a valid group range to
/proc/sys/net/ipv4/ping_group_range which results in all unprivileged users
being allowed to open restricted ICMP sockets and trigger this bug

Status

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2851
• https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=b04c46190219a4f845e46a459e3102137b7f6cac
• http://www.openwall.com/lists/oss-security/2014/04/11/4
• https://lkml.org/lkml/2014/4/10/736
• https://bugzilla.redhat.com/show_bug.cgi?id=1086730
• https://ubuntu.com/security/notices/USN-2221-1
• https://ubuntu.com/security/notices/USN-2223-1
• https://ubuntu.com/security/notices/USN-2224-1
• https://ubuntu.com/security/notices/USN-2225-1
• https://ubuntu.com/security/notices/USN-2226-1
• https://ubuntu.com/security/notices/USN-2227-1
• https://ubuntu.com/security/notices/USN-2228-1
• https://ubuntu.com/security/notices/USN-2260-1
• NVD
• Launchpad
• Debian

Bugs

• https://launchpad.net/bugs/1312994