O-059: Debian Linux-Kernel-2.4.17-ia64 Vulnerabilities

Revision History:
3/2/04 - Added link to Debian DSA 442-1 for patches fixing vulnerabilities on 
         network interface card (NIC) device drivers and for the do_brk 
         function.

		 
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Debian Security Advisory

DSA-423-1 linux-kernel-2.4.17-ia64 -- several vulnerabilities

Date Reported: 
15 Jan 2004 
Affected Packages: 
kernel-image-2.4.17-ia64 
Vulnerable: 
Yes 
Security database references: 
In Mitre's CVE dictionary: 
CAN-2003-0001, CVE-2003-0018, CVE-2003-0127, CVE-2003-0461, CVE-2003-0462, CVE-2003-0476, CVE-2003-0501, 
CVE-2003-0550, CVE-2003-0551, CVE-2003-0552, CVE-2003-0961, CVE-2003-0985	

More information: 

The IA-64 maintainers fixed several security related bugs in the Linux kernel 2.4.17 used for the IA-64 
architecture, mostly by backporting fixes from 2.4.18. The corrections are listed below with the 
identification from the Common Vulnerabilities and Exposures (CVE) project:


CAN-2003-0001: 
Multiple ethernet network interface card (NIC) device drivers do not pad frames with null bytes, which 
allows remote attackers to obtain information from previous packets or kernel memory by using malformed 
packets, as demonstrated by Etherleak.

CAN-2003-0018: 
Linux kernel 2.4.10 through 2.4.21-pre4 does not properly handle the O_DIRECT feature, which allows local 
attackers with write privileges to read portions of previously deleted files, or cause file system corruption.

CAN-2003-0127: 
The kernel module loader in Linux kernel 2.2.x before 2.2.25, and 2.4.x before 2.4.21, allows local users to 
gain root privileges by using ptrace to attach to a child process which is spawned by the kernel.

CAN-2003-0461: 
The virtual file /proc/tty/driver/serial in Linux 2.4.x reveals the exact number of characters used in serial 
links, which could allow local users to obtain potentially sensitive information such as the length of passwords.

CAN-2003-0462: 
A race condition in the way env_start and env_end pointers are initialized in the execve system call and used in 
fs/proc/base.c on Linux 2.4 allows local users to cause a denial of service (crash).

CAN-2003-0476: 
The execve system call in Linux 2.4.x records the file descriptor of the executable process in the file table of 
the calling process, which allows local users to gain read access to restricted file descriptors.

CAN-2003-0501: 
The /proc filesystem in Linux allows local users to obtain sensitive information by opening various entries in 
/proc/self before executing a setuid program, which causes the program to fail to change the ownership and 
permissions of those entries.

CAN-2003-0550: 
The STP protocol, as enabled in Linux 2.4.x, does not provide sufficient security by design, which allows attackers 
to modify the bridge topology.

CAN-2003-0551: 
The STP protocol implementation in Linux 2.4.x does not properly verify certain lengths, which could allow attackers to cause a denial of service.

CAN-2003-0552: 
Linux 2.4.x allows remote attackers to spoof the bridge Forwarding table via forged packets whose source addresses 
are the same as the target.

CAN-2003-0961: 
An integer overflow in brk system call (do_brk function) for Linux kernel 2.4.22 and earlier allows local users to 
gain root privileges.

CAN-2003-0985: 
The mremap system call (do_mremap) in Linux kernel 2.4 and 2.6 does not properly perform boundary checks, which 
allows local users to cause a denial of service and possibly gain privileges by causing a remapping of a virtual memory area (VMA) to create a zero length VMA.

For the stable distribution (woody) this problem has been fixed in version kernel-image-2.4.17-ia64 for the ia64 
architecture. Other architectures are already or will be fixed separately.

For the unstable distribution (sid) this problem will be fixed soon with newly uploaded packages.

Fixed in: 
Debian GNU/Linux 3.0 (woody)
Source: 
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-ia64/kernel-image-2.4.17-ia64_011226.15.dsc

http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-ia64/kernel-image-2.4.17-ia64_011226.15.tar.gz

Architecture-independent component: 
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-ia64/kernel-source-2.4.17-ia64_011226.15_all.deb

Intel IA-64: 
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-ia64/kernel-headers-2.4.17-ia64_011226.15_ia64.deb

http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-ia64/kernel-image-2.4.17-itanium_011226.15_ia64.deb

http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-ia64/kernel-image-2.4.17-itanium-smp_011226.15_ia64.deb

http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-ia64/kernel-image-2.4.17-mckinley_011226.15_ia64.deb

http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-ia64/kernel-image-2.4.17-mckinley-smp_011226.15_ia64.deb

MD5 checksums of the listed files are available in the original advisory.


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Last Modified: Thu, Jan 15 14:36:49 UTC 2004 
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