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Linux Kernel Multiple Vulnerabilities
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Secunia Advisory:
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SA16494
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Release Date:
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2005-08-25
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Last Update:
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2006-10-17
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Popularity:
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12,678 views
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Critical:
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Less critical
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Impact:
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Security Bypass
Exposure of sensitive information
DoS
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| OS: | Linux Kernel 2.4.x
Linux Kernel 2.6.x
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Secunia CVSS-2 Score:
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| Advisory Content (Page 1 of 3) | [ 1 ] [ 2 ] [ 3 ] | |
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Description:
Some vulnerabilities have been reported in the Linux kernel, which can be exploited by malicious, local users to cause a DoS (Denial of Service), disclose potentially sensitive information, and bypass certain security restrictions, or by malicious people to cause a DoS.
1) The "setsockopt()" function is not restricted to privileged users with the "CAP_NET_ADMIN" capability. This can be exploited to bypass IPsec policies or set invalid policies to exploit other vulnerabilities or exhaust available kernel memory.
2) An error in the "syscall32_setup_pages()" function on 64-bit x86 platforms can be exploited to cause a memory leak by executing a malicious 32-bit application with specially crafted ELF headers.
3) An error in seq_file implementation in the SCSI procfs interface (sg.c), can be exploited to cause a memory leak by repeatedly reading from the /proc/scsi/sg/devices file.
4) An error in validating the first argument of the "sys_set_mempolicy()" function in "mm/mempolicy.c" may be exploited to cause a DoS via a negative argument value.
5) An error in declaring the "portptr" variable that points to the port number in the conntrack tuple as static in "ip_nat_proto_tcp.c" and "ip_nat_proto_udp.c" may be exploited by malicious people to cause memory corruption by causing two packets belonging to the same protocol to be NATed at the same time.
6) A race condition in connection timer handling on SMP multiprocessor systems can be exploited to crash the kernel by setting up an expiration handler to modify the "ip_vs_conn_tab" connection list while the list still being traversed.
7) The "sys_get_thread_area()" function does not properly clear its returned structure. This can potentially expose a small amount of kernel memory to userspace programs.
8) The "icmp_push_reply function()" function does not properly free memory when the "ip_append_data()" function fails. This can be exploited by malicious people to exhaust memory via a large number of specially crafted packets that cause the function to fail.
9) A memory leak in the "ip6_input_finish()" function in "/net/ipv6/ip6_input.c" may be exploit to cause a DoS via certain malformed IPv6 packets that prevents the SKB from being freed.
10) An error during error recovery in the "__block_prepare_write()" function in fs/buffer.c may disclose contents of previously deleted files.
The vulnerabilities have been reported in the 2.6 kernel. Vulnerability #6 also affects the 2.4 kernel.
Change Page:
[ 1 ] [ 2 ] [ 3 ]
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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