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. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2004-1017 Multiple overflows exist in the io_edgeport driver which might be usable as a denial of service attack vector. CVE-2005-0124 Bryan Fulton reported a bounds checking bug in the coda_pioctl function which may allow local users to execute arbitrary code or trigger a denial of service attack. CVE-2005-0449 An error in the skb_checksum_help() function from the netfilter framework has been discovered that allows the bypass of packet filter rules or a denial of service attack. CVE-2005-2457 Tim Yamin discovered that insufficient input validation in the zisofs driver for compressed ISO file systems allows a denial of service attack through maliciously crafted ISO images. CVE-2005-2490 A buffer overflow in the sendmsg() function allows local users to execute arbitrary code. CVE-2005-2555 Herbert Xu discovered that the setsockopt() function was not restricted to users/processes with the CAP_NET_ADMIN capability. This allows attackers to manipulate IPSEC policies or initiate a denial of service attack. CVE-2005-2709 Al Viro discovered a race condition in the /proc handling of network devices. A (local) attacker could exploit the stale reference after interface shutdown to cause a denial of service or possibly execute code in kernel mode. CVE-2005-2800 Jan Blunck discovered that repeated failed reads of /proc/scsi/sg/devices leak memory, which allows a denial of service attack. CVE-2005-2973 Tetsuo Handa discovered that the udp_v6_get_port() function from the IPv6 code can be forced into an endless loop, which allows a denial of service attack. CVE-2005-3044 Vasiliy Averin discovered that the reference counters from sockfd_put() and fput() can be forced into overlapping, which allows a denial of service attack through a null pointer dereference. CVE-2005-3053 Eric Dumazet discovered that the set_mempolicy() system call accepts a negative value for its first argument, which triggers a BUG() assert. This allows a denial of service attack. CVE-2005-3055 Harald Welte discovered that if a process issues a USB Request Block (URB) to a device and terminates before the URB completes, a stale pointer would be dereferenced. This could be used to trigger a denial of service attack. CVE-2005-3180 Pavel Roskin discovered that the driver for Orinoco wireless cards clears its buffers insufficiently. This could leak sensitive information into user space. CVE-2005-3181 Robert Derr discovered that the audit subsystem uses an incorrect function to free memory, which allows a denial of service attack. CVE-2005-3257 Rudolf Polzer discovered that the kernel improperly restricts access to the KDSKBSENT ioctl, which can possibly lead to privilege escalation. CVE-2005-3356 Doug Chapman discovered that the mq_open syscall can be tricked into decrementing an internal counter twice, which allows a denial of service attack through a kernel panic. CVE-2005-3358 Doug Chapman discovered that passing a zero bitmask to the set_mempolicy() system call leads to a kernel panic, which allows a denial of service attack. CVE-2005-3783 The ptrace code using CLONE_THREAD didn't use the thread group ID to determine whether the caller is attaching to itself, which allows a denial of service attack. CVE-2005-3784 The auto-reaping of child processes functionality included ptraced-attached processes, which allows denial of service through dangling references. CVE-2005-3806 Yen Zheng discovered that the IPv6 flow label code modified an incorrect variable, which could lead to memory corruption and denial of service. CVE-2005-3847 It was discovered that a threaded real-time process, which is currently dumping core can be forced into a dead-lock situation by sending it a SIGKILL signal, which allows a denial of service attack. CVE-2005-3848 Ollie Wild discovered a memory leak in the icmp_push_reply() function, which allows denial of service through memory consumption. CVE-2005-3857 Chris Wright discovered that excessive allocation of broken file lock leases in the VFS layer can exhaust memory and fill up the system logging, which allows denial of service. CVE-2005-3858 Patrick McHardy discovered a memory leak in the ip6_input_finish() function from the IPv6 code, which allows denial of service. CVE-2005-4605 Karl Janmar discovered that a signedness error in the procfs code can be exploited to read kernel memory, which may disclose sensitive information. CVE-2005-4618 Yi Ying discovered that sysctl does not properly enforce the size of a buffer, which allows a denial of service attack. CVE-2006-0095 Stefan Rompf discovered that dm_crypt does not clear an internal struct before freeing it, which might disclose sensitive information. CVE-2006-0096 It was discovered that the SDLA driver's capability checks were too lax for firmware upgrades. CVE-2006-0482 Ludovic Courtes discovered that get_compat_timespec() performs insufficient input sanitizing, which allows a local denial of service attack. CVE-2006-1066 It was discovered that ptrace() on the ia64 architecture allows a local denial of service attack, when preemption is enabled. The following matrix explains which kernel version for which architecture fix the problems mentioned above: Debian 3.1 (sarge) Source 2.6.8-16sarge2 Alpha architecture 2.6.8-16sarge2 AMD64 architecture 2.6.8-16sarge2 HP Precision architecture 2.6.8-6sarge2 Intel IA-32 architecture 2.6.8-16sarge2 Intel IA-64 architecture 2.6.8-14sarge2 Motorola 680x0 architecture2.6.8-4sarge2 PowerPC architecture 2.6.8-12sarge2 IBM S/390 architecture 2.6.8-5sarge2 Sun Sparc architecture 2.6.8-15sarge2 The following matrix lists additional packages that were rebuilt for compatibility with or to take advantage of this update: Debian 3.1 (sarge) kernel-latest-2.6-alpha 101sarge1 kernel-latest-2.6-amd64 103sarge1 kernel-latest-2.6-hppa 2.6.8-1sarge1 kernel-latest-2.6-sparc 101sarge1 kernel-latest-2.6-i386 101sarge1 kernel-latest-powerpc 102sarge1 fai-kernels 1.9.1sarge1 hostap-modules-i386 0.3.7-1sarge1 mol-modules-2.6.8 0.9.70+2.6.8+12sarge1 ndiswrapper-modules-i3861.1-2sarge1 We recommend that you upgrade your kernel package immediately and reboot the machine. If you have built a custom kernel from the kernel source package, you will need to rebuild to take advantage of these fixes. This update introduces a change in the kernel's binary interface, the affected kernel packages inside Debian have been rebuilt, if you're running local addons you'll need to rebuild these as well. Due to the change in the package name you need to use apt-get dist-upgrade to update your system.
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. The Common Vulnerabilities and Exposures project identifies the following problems:
Multiple overflows exist in the io_edgeport driver which might be usable as a denial of service attack vector.
Bryan Fulton reported a bounds checking bug in the coda_pioctl function which may allow local users to execute arbitrary code or trigger a denial of service attack.
An error in the skb_checksum_help() function from the netfilter framework has been discovered that allows the bypass of packet filter rules or a denial of service attack.
Tim Yamin discovered that insufficient input validation in the zisofs driver for compressed ISO file systems allows a denial of service attack through maliciously crafted ISO images.
A buffer overflow in the sendmsg() function allows local users to execute arbitrary code.
Herbert Xu discovered that the setsockopt() function was not restricted to users/processes with the CAP_NET_ADMIN capability. This allows attackers to manipulate IPSEC policies or initiate a denial of service attack.
Al Viro discovered a race condition in the /proc handling of network devices. A (local) attacker could exploit the stale reference after interface shutdown to cause a denial of service or possibly execute code in kernel mode.
Jan Blunck discovered that repeated failed reads of /proc/scsi/sg/devices leak memory, which allows a denial of service attack.
Tetsuo Handa discovered that the udp_v6_get_port() function from the IPv6 code can be forced into an endless loop, which allows a denial of service attack.
Vasiliy Averin discovered that the reference counters from sockfd_put() and fput() can be forced into overlapping, which allows a denial of service attack through a null pointer dereference.
Eric Dumazet discovered that the set_mempolicy() system call accepts a negative value for its first argument, which triggers a BUG() assert. This allows a denial of service attack.
Harald Welte discovered that if a process issues a USB Request Block (URB) to a device and terminates before the URB completes, a stale pointer would be dereferenced. This could be used to trigger a denial of service attack.
Pavel Roskin discovered that the driver for Orinoco wireless cards clears its buffers insufficiently. This could leak sensitive information into user space.
Robert Derr discovered that the audit subsystem uses an incorrect function to free memory, which allows a denial of service attack.
Rudolf Polzer discovered that the kernel improperly restricts access to the KDSKBSENT ioctl, which can possibly lead to privilege escalation.
Doug Chapman discovered that the mq_open syscall can be tricked into decrementing an internal counter twice, which allows a denial of service attack through a kernel panic.
Doug Chapman discovered that passing a zero bitmask to the set_mempolicy() system call leads to a kernel panic, which allows a denial of service attack.
The ptrace code using CLONE_THREAD didn't use the thread group ID to determine whether the caller is attaching to itself, which allows a denial of service attack.
The auto-reaping of child processes functionality included ptraced-attached processes, which allows denial of service through dangling references.
Yen Zheng discovered that the IPv6 flow label code modified an incorrect variable, which could lead to memory corruption and denial of service.
It was discovered that a threaded real-time process, which is currently dumping core can be forced into a dead-lock situation by sending it a SIGKILL signal, which allows a denial of service attack.
Ollie Wild discovered a memory leak in the icmp_push_reply() function, which allows denial of service through memory consumption.
Chris Wright discovered that excessive allocation of broken file lock leases in the VFS layer can exhaust memory and fill up the system logging, which allows denial of service.
Patrick McHardy discovered a memory leak in the ip6_input_finish() function from the IPv6 code, which allows denial of service.
Karl Janmar discovered that a signedness error in the procfs code can be exploited to read kernel memory, which may disclose sensitive information.
Yi Ying discovered that sysctl does not properly enforce the size of a buffer, which allows a denial of service attack.
Stefan Rompf discovered that dm_crypt does not clear an internal struct before freeing it, which might disclose sensitive information.
It was discovered that the SDLA driver's capability checks were too lax for firmware upgrades.
Ludovic Courtes discovered that get_compat_timespec() performs insufficient input sanitizing, which allows a local denial of service attack.
It was discovered that ptrace() on the ia64 architecture allows a local denial of service attack, when preemption is enabled.
The following matrix explains which kernel version for which architecture fix the problems mentioned above:
| Debian 3.1 (sarge) | |
|---|---|
| Source | 2.6.8-16sarge2 |
| Alpha architecture | 2.6.8-16sarge2 |
| AMD64 architecture | 2.6.8-16sarge2 |
| HP Precision architecture | 2.6.8-6sarge2 |
| Intel IA-32 architecture | 2.6.8-16sarge2 |
| Intel IA-64 architecture | 2.6.8-14sarge2 |
| Motorola 680x0 architecture | 2.6.8-4sarge2 |
| PowerPC architecture | 2.6.8-12sarge2 |
| IBM S/390 architecture | 2.6.8-5sarge2 |
| Sun Sparc architecture | 2.6.8-15sarge2 |
The following matrix lists additional packages that were rebuilt for compatibility with or to take advantage of this update:
| Debian 3.1 (sarge) | |
|---|---|
| kernel-latest-2.6-alpha | 101sarge1 |
| kernel-latest-2.6-amd64 | 103sarge1 |
| kernel-latest-2.6-hppa | 2.6.8-1sarge1 |
| kernel-latest-2.6-sparc | 101sarge1 |
| kernel-latest-2.6-i386 | 101sarge1 |
| kernel-latest-powerpc | 102sarge1 |
| fai-kernels | 1.9.1sarge1 |
| hostap-modules-i386 | 0.3.7-1sarge1 |
| mol-modules-2.6.8 | 0.9.70+2.6.8+12sarge1 |
| ndiswrapper-modules-i386 | 1.1-2sarge1 |
We recommend that you upgrade your kernel package immediately and reboot the machine. If you have built a custom kernel from the kernel source package, you will need to rebuild to take advantage of these fixes.
This update introduces a change in the kernel's binary interface, the affected kernel packages inside Debian have been rebuilt, if you're running local addons you'll need to rebuild these as well. Due to the change in the package name you need to use apt-get dist-upgrade to update your system.
MD5 checksums of the listed files are available in the original advisory.
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