From 4f2d7949f03e1c198bc888f2d05f421d35c57e21 Mon Sep 17 00:00:00 2001 From: V3n3RiX Date: Mon, 9 Oct 2017 18:53:29 +0100 Subject: reinit the tree, so we can have metadata --- metadata/glsa/glsa-200407-12.xml | 132 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 132 insertions(+) create mode 100644 metadata/glsa/glsa-200407-12.xml (limited to 'metadata/glsa/glsa-200407-12.xml') diff --git a/metadata/glsa/glsa-200407-12.xml b/metadata/glsa/glsa-200407-12.xml new file mode 100644 index 000000000000..05c22c78ccff --- /dev/null +++ b/metadata/glsa/glsa-200407-12.xml @@ -0,0 +1,132 @@ + + + + Linux Kernel: Remote DoS vulnerability with IPTables TCP Handling + + A flaw has been discovered in 2.6 series Linux kernels that allows an + attacker to send a malformed TCP packet, causing the affected kernel to + possibly enter an infinite loop and hang the vulnerable machine. + + Kernel + 2004-07-14 + 2004-10-10: 02 + 55694 + remote + + + 2.6.5-r5 + 2.6 + 2.6.5-r5 + + + 2.6.7-r2 + 2.6 + 2.6.7-r2 + + + 2.6.8 + 2.6.8 + + + 2.6.7-r7 + 2.6.7-r7 + + + 2.6.7-r1 + 2.6.7-r1 + + + 2.6.7_p1-r1 + 2.6.7_p1-r1 + + + 2.6.4-r4 + 2.6 + 2.6.4-r4 + + + 2.6.7-r4 + 2.6 + 2.6.7-r4 + + + 2.6.7-r1 + 2.6.7-r1 + + + 2.6.7-r1 + 2.6.7-r1 + + + 2.6.7_p0-r1 + 2.6 + 2.6.7_p0 + + + 2.6.6-r2 + 2.6 + 2.6.6-r2 + + + 2.6.7-r1 + 2.6 + 2.6.7-r1 + + + 2.6.7-r1 + 2.6 + 2.6.7-r1 + + + +

+ The Linux kernel is responsible for managing the core aspects of a + GNU/Linux system, providing an interface for core system applications as + well as providing the essential structure and capability to access hardware + that is needed for a running system. +

+
+ +

+ An attacker can utilize an erroneous data type in the IPTables TCP option + handling code, which lies in an iterator. By making a TCP packet with a + header length larger than 127 bytes, a negative integer would be implied in + the iterator. +

+
+ +

+ By sending one malformed packet, the kernel could get stuck in a loop, + consuming all of the CPU resources and rendering the machine useless, + causing a Denial of Service. This vulnerability requires no local access. +

+
+ +

+ If users do not use the netfilter functionality or do not use any + ``--tcp-option'' rules they are not vulnerable to this exploit. Users that + are may remove netfilter support from their kernel or may remove any + ``--tcp-option'' rules they might be using. However, all users are urged to + upgrade their kernels to patched versions. +

+
+ +

+ Users are encouraged to upgrade to the latest available sources for their + system: +

+ + # emerge sync + # emerge -pv your-favorite-sources + # emerge your-favorite-sources + + # # Follow usual procedure for compiling and installing a kernel. + # # If you use genkernel, run genkernel as you would do normally. +
+ + CAN-2004-0626 + + + plasmaroo + +
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