Qualys has released a large amount of research surrounding the use of stack clash vulnerabilities and how stack guard on Linux can be bypassed.
91191a0fae00196fec218203d9999e82VMware Security Advisory 2011-0009 - VMware hosted product updates, ESX patches and VI Client update resolve multiple security issues.
2c48563cecfe0e55c7ce0b6bd7e6fe54VMware Security Advisory 2011-0007 - VMware ESXi and ESX could encounter a socket exhaustion situation which may lead to a denial of service. Updates to Likewise components and to the ESX Service Console address security vulnerabilities.
18fcd61472c2d3dc5117dfc507ce0b0fMandriva Linux Security Advisory 2011-051 - The Linux 2.6 kernel has been updated to mitigate multiple vulnerabilities related to denial of service, arbitrary code execution, stack memory disclosure, restriction bypass, and more.
f2ce03c37e6b21cbf22fe118915e6000Ubuntu Security Notice 1074-2 - USN-1074-1 fixed vulnerabilities in linux-fsl-imx51 in Ubuntu 9.10. This update provides the corresponding updates for Ubuntu 10.04. Multiple vulnerabilities have been discovered and addressed in the Linux kernel. Al Viro discovered a race condition in the TTY driver. Dan Rosenberg discovered that the MOVE_EXT ext4 ioctl did not correctly check file permissions. Neil Brown discovered that NFSv4 did not correctly check certain write requests. David Howells discovered that DNS resolution in CIFS could be spoofed. Various other issues have also been addressed.
3c50452827e25742bef7840b721455f6Ubuntu Security Notice 1074-1 - Multiple vulnerabilities have been discovered and addressed in the Linux kernel. Al Viro discovered a race condition in the TTY driver. Dan Rosenberg discovered that the MOVE_EXT ext4 ioctl did not correctly check file permissions. Neil Brown discovered that NFSv4 did not correctly check certain write requests. David Howells discovered that DNS resolution in CIFS could be spoofed. Various other issues have also been addressed.
934d6a5d2bde45285650af4dbbaad8b2Mandriva Linux Security Advisory 2010-172 - Some vulnerabilities were discovered and corrected in the Linux kernel. Buffer overflow in the ecryptfs_uid_hash macro in fs/ecryptfs/messaging.c in the eCryptfs subsystem in the Linux kernel before 2.6.35 might allow local users to gain privileges or cause a denial of service via unspecified vectors. The DNS resolution functionality in the CIFS implementation in the Linux kernel before 2.6.35, when CONFIG_CIFS_DFS_UPCALL is enabled, relies on a user's keyring for the dns_resolver upcall in the cifs.upcall userspace helper, which allows local users to spoof the results of DNS queries and perform arbitrary CIFS mounts via vectors involving an add_key call, related to a cache stuffing issue and MS-DFS referrals. The do_anonymous_page function in mm/memory.c in the Linux kernel before 2.6.27.52, 2.6.32.x before 2.6.32.19, 2.6.34.x before 2.6.34.4, and 2.6.35.x before 2.6.35.2 does not properly separate the stack and the heap, which allows context-dependent attackers to execute arbitrary code by writing to the bottom page of a shared memory segment, as demonstrated by a memory-exhaustion attack against the X.Org X server. Integer overflow in the ext4_ext_get_blocks function in fs/ext4/extents.c in the Linux kernel before 2.6.34 allows local users to cause a denial of service via a write operation on the last block of a large file, followed by a sync operation.
42e8224f2625e072bff3266c7756ac26Ubuntu Security Notice 974-2 - USN-974-1 fixed vulnerabilities in the Linux kernel. The fixes for CVE-2010-2240 caused failures for Xen hosts. This update fixes the problem. Gael Delalleu, Rafal Wojtczuk, and Brad Spengler discovered that the memory manager did not properly handle when applications grow stacks into adjacent memory regions. Kees Cook discovered that under certain situations the ioctl subsystem for DRM did not properly sanitize its arguments. Ben Hawkes discovered an integer overflow in the Controller Area Network (CAN) subsystem when setting up frame content and filtering certain messages.
3aab12c90f2cb1286a5d95fa9c8754feDebian Linux Security Advisory 2094-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or privilege escalation.
5193cd6c08da4c23384565ae1037c40fUbuntu Security Notice 974-1 - Gael Delalleu, Rafal Wojtczuk, and Brad Spengler discovered that the memory manager did not properly handle when applications grow stacks into adjacent memory regions. A local attacker could exploit this to gain control of certain applications, potentially leading to privilege escalation, as demonstrated in attacks against the X server. Kees Cook discovered that under certain situations the ioctl subsystem for DRM did not properly sanitize its arguments. A local attacker could exploit this to read previously freed kernel memory, leading to a loss of privacy. Ben Hawkes discovered an integer overflow in the Controller Area Network (CAN) subsystem when setting up frame content and filtering certain messages. An attacker could send specially crafted CAN traffic to crash the system or gain root privileges.
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