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CVE-2007-1497

Status Candidate

Overview

nf_conntrack in netfilter in the Linux kernel before 2.6.20.3 does not set nfctinfo during reassembly of fragmented packets, which leaves the default value as IP_CT_ESTABLISHED and might allow remote attackers to bypass certain rulesets using IPv6 fragments.

Related Files

Mandriva Linux Security Advisory 2007.196
Posted Oct 16, 2007
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory - The compat_sys_mount function in fs/compat.c allowed local users to cause a denial of service (NULL pointer dereference and oops) by mounting a smbfs file system in compatibility mode. The nf_conntrack function in netfilter did not set nfctinfo during reassembly of fragmented packets, which left the default value as IP_CT_ESTABLISHED and could allow remote attackers to bypass certain rulesets using IPv6 fragments. A typo in the Linux kernel caused RTA_MAX to be used as an array size instead of RTN_MAX, which lead to an out of bounds access by certain functions. The IPv6 protocol allowed remote attackers to cause a denial of service via crafted IPv6 type 0 route headers that create network amplification between two routers. The random number feature did not properly seed pools when there was no entropy, or used an incorrect cast when extracting entropy, which could cause the random number generator to provide the same values after reboots on systems without an entropy source. A memory leak in the PPPoE socket implementation allowed local users to cause a denial of service (memory consumption) by creating a socket using connect, and releasing it before the PPPIOCGCHAN ioctl is initialized. An integer underflow in the cpuset_tasks_read function, when the cpuset filesystem is mounted, allowed local users to obtain kernel memory contents by using a large offset when reading the /dev/cpuset/tasks file. The sctp_new function in netfilter allowed remote attackers to cause a denial of service by causing certain invalid states that triggered a NULL pointer dereference. A stack-based buffer overflow in the random number generator could allow local root users to cause a denial of service or gain privileges by setting the default wakeup threshold to a value greater than the output pool size. The lcd_write function did not limit the amount of memory used by a caller, which allows local users to cause a denial of service (memory consumption). The Linux kernel allowed local users to send arbitrary signals to a child process that is running at higher privileges by causing a setuid-root parent process to die which delivered an attacker-controlled parent process death signal (PR_SET_PDEATHSIG). The aac_cfg_openm and aac_compat_ioctl functions in the SCSI layer ioctl patch in aacraid did not check permissions for ioctls, which might allow local users to cause a denial of service or gain privileges. The IA32 system call emulation functionality, when running on the x86_64 architecture, did not zero extend the eax register after the 32bit entry path to ptrace is used, which could allow local users to gain privileges by triggering an out-of-bounds access to the system call table using the %RAX register.

tags | advisory, remote, denial of service, overflow, arbitrary, kernel, local, root, protocol, memory leak
systems | linux, mandriva
advisories | CVE-2006-7203, CVE-2007-1497, CVE-2007-2172, CVE-2007-2242, CVE-2007-2453, CVE-2007-2525, CVE-2007-2875, CVE-2007-2876, CVE-2007-3105, CVE-2007-3513, CVE-2007-3848, CVE-2007-4308, CVE-2007-4573
MD5 | c9c788c8ab303f6c67b69c3510264278
Mandriva Linux Security Advisory 2007.171
Posted Aug 29, 2007
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory - Some vulnerabilities have been discovered and corrected in the Linux 2.6 kernel.

tags | advisory, kernel, vulnerability
systems | linux, mandriva
advisories | CVE-2006-5755, CVE-2006-7203, CVE-2007-1496, CVE-2007-1497, CVE-2007-1861, CVE-2007-2172, CVE-2007-2242, CVE-2007-2453, CVE-2007-2525, CVE-2007-2875, CVE-2007-2876
MD5 | 02cc4798552436a0a839fc77777adec4
Ubuntu Security Notice 464-1
Posted May 30, 2007
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 464-1 - Multiple vulnerabilities have been patched against in the Linux kernel. Philipp Richter discovered that the AppleTalk protocol handler did not sufficiently verify the length of packets. By sending a crafted AppleTalk packet, a remote attacker could exploit this to crash the kernel. Gabriel Campana discovered that the do_ipv6_setsockopt() function did not sufficiently verify option values for IPV6_RTHDR. A local attacker could exploit this to trigger a kernel crash. A Denial of Service vulnerability was discovered in the nfnetlink_log() netfilter function. A remote attacker could exploit this to trigger a kernel crash. The connection tracking module for IPv6 did not properly handle the status field when reassembling fragmented packets, so that the final packet always had the 'established' state. A remote attacker could exploit this to bypass intended firewall rules. Masayuki Nakagawa discovered an error in the flowlabel handling of IPv6 network sockets. A local attacker could exploit this to crash the kernel. The do_dccp_getsockopt() function did not sufficiently verify the optlen argument. A local attacker could exploit this to read kernel memory (which might expose sensitive data) or cause a kernel crash. This only affects Ubuntu 7.04. The IPv4 and DECnet network protocol handlers incorrectly declared an array variable so that it became smaller than intended. By sending crafted packets over a netlink socket, a local attacker could exploit this to crash the kernel.

tags | advisory, remote, denial of service, kernel, local, vulnerability, protocol
systems | linux, ubuntu
advisories | CVE-2007-1357, CVE-2007-1388, CVE-2007-1496, CVE-2007-1497, CVE-2007-1592, CVE-2007-1730, CVE-2007-2172
MD5 | 9b31d90401441ebd4532d2e93a14c4fe
Debian Linux Security Advisory 1289-1
Posted May 15, 2007
Authored by Debian | Site debian.org

Debian Security Advisory 1289-1 - Several local and remote vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code.

tags | advisory, remote, denial of service, arbitrary, kernel, local, vulnerability
systems | linux, debian
advisories | CVE-2007-1496, CVE-2007-1497, CVE-2007-1861
MD5 | aa26a2d339a1d2e6a053d8edeb795ca5
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