arch/s390/kernel/ptrace.c in the Linux kernel before 3.15.8 on the s390 platform does not properly restrict address-space control operations in PTRACE_POKEUSR_AREA requests, which allows local users to obtain read and write access to kernel memory locations, and consequently gain privileges, via a crafted application that makes a ptrace system call.

References

• https://nvd.nist.gov/vuln/detail/CVE-2014-3534
• torvalds/linux@dab6cf5
• https://bugzilla.redhat.com/show_bug.cgi?id=1114089
• https://exchange.xforce.ibmcloud.com/vulnerabilities/95069
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=dab6cf55f81a6e16b8147aed9a843e1691dcd318
• http://secunia.com/advisories/59790
• http://secunia.com/advisories/60351
• http://www.debian.org/security/2014/dsa-2992
• http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.15.8
• http://www.osvdb.org/109546
• http://www.securityfocus.com/bid/68940
• http://www.securitytracker.com/id/1030683
• https://access.redhat.com/errata/RHSA-2014:1023
• https://access.redhat.com/security/cve/CVE-2014-3534
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=dab6cf55f81a6e16b8147aed9a843e1691dcd318