Explain CVE-2015-1593
The stack randomization feature in the Linux kernel before 3.19.1 on 64-bit platforms uses incorrect data types for the results of bitwise left-shift operations, which makes it easier for attackers to bypass the ASLR protection mechanism by predicting the address of the top of the stack, related to the randomize_stack_top function in fs/binfmt_elf.c and the stack_maxrandom_size function in arch/x86/mm/mmap.c.
Affected Products: n/a
References: [{'tags': ['x_refsource_CONFIRM'], 'url': 'https://github.com/torvalds/linux/commit/4e7c22d447bb6d7e37bfe39ff658486ae78e8d77'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.19.1'}, {'name': 'DSA-3170', 'tags': ['vendor-advisory', 'x_refsource_DEBIAN'], 'url': 'http://www.debian.org/security/2015/dsa-3170'}, {'name': 'SUSE-SU-2015:0736', 'tags': ['vendor-advisory', 'x_refsource_SUSE'], 'url': 'http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00015.html'}, {'name': 'USN-2562-1', 'tags': ['vendor-advisory', 'x_refsource_UBUNTU'], 'url': 'http://www.ubuntu.com/usn/USN-2562-1'}, {'name': 'USN-2565-1', 'tags': ['vendor-advisory', 'x_refsource_UBUNTU'], 'url': 'http://www.ubuntu.com/usn/USN-2565-1'}, {'name': 'USN-2561-1', 'tags': ['vendor-advisory', 'x_refsource_UBUNTU'], 'url': 'http://www.ubuntu.com/usn/USN-2561-1'}, {'name': '72607', 'tags': ['vdb-entry', 'x_refsource_BID'], 'url': 'http://www.securityfocus.com/bid/72607'}, {'name': 'USN-2564-1', 'tags': ['vendor-advisory', 'x_refsource_UBUNTU'], 'url': 'http://www.ubuntu.com/usn/USN-2564-1'}, {'name': 'USN-2563-1', 'tags': ['vendor-advisory', 'x_refsource_UBUNTU'], 'url': 'http://www.ubuntu.com/usn/USN-2563-1'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=4e7c22d447bb6d7e37bfe39ff658486ae78e8d77'}, {'name': 'RHSA-2015:1138', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'http://rhn.redhat.com/errata/RHSA-2015-1138.html'}, {'tags': ['x_refsource_MISC'], 'url': 'http://hmarco.org/bugs/linux-ASLR-integer-overflow.html'}, {'name': 'USN-2560-1', 'tags': ['vendor-advisory', 'x_refsource_UBUNTU'], 'url': 'http://www.ubuntu.com/usn/USN-2560-1'}, {'name': '[oss-security] 20150213 Re: CVE-Request -- Linux ASLR integer overflow', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'http://www.openwall.com/lists/oss-security/2015/02/13/13'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1192519'}, {'name': 'openSUSE-SU-2015:0714', 'tags': ['vendor-advisory', 'x_refsource_SUSE'], 'url': 'http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00009.html'}, {'name': 'RHSA-2015:1137', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'http://rhn.redhat.com/errata/RHSA-2015-1137.html'}, {'name': '[linux-kernel] 20150107 Re: [PATH] Fix stack randomization on x86_64 bit', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lkml.org/lkml/2015/1/7/811'}, {'name': 'RHSA-2015:1221', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'http://rhn.redhat.com/errata/RHSA-2015-1221.html'}, {'name': 'RHSA-2019:3517', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2019:3517'}]
CVE State: PUBLISHED