CVE-2010-4160: Integer Overflow
First published: Wed Nov 10 2010(Updated: )
Description of problem: Both PPPoL2TP (in net/l2tp/l2tp_ppp.c, pppol2tp_sendmsg()) and IPoL2TP (in net/l2tp/l2tp_ip.c, l2tp_ip_sendmsg()) make calls to sock_wmalloc() that perform arithmetic on the size argument without any maximum bound. As a result, by issuing sendto() calls with very large sizes, this allocation size will wrap and result in a small buffer being allocated, leading to ugliness immediately after (probably kernel panics due to bad sk_buff tail position, but possibly kernel heap corruption). Reference: <a href="http://www.spinics.net/lists/netdev/msg145673.html">http://www.spinics.net/lists/netdev/msg145673.html</a> Acknowledgements: Red Hat would like to thank Dan Rosenberg for reporting this issue.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux-2.6 | ||
| Linux Kernel | <2.6.36.2 | |
| openSUSE | =11.2 | |
| SUSE Linux Enterprise Desktop with Beagle | =10-sp3 | |
| SUSE Linux Enterprise Desktop with Beagle | =11-sp1 | |
| SUSE Linux Enterprise Server | =9 | |
| SUSE Linux Enterprise Server | =10-sp3 | |
| SUSE Linux Enterprise Server | =11-sp1 | |
| SUSE Linux Enterprise Software Development Kit | =10-sp3 |
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Reference Links
- http://xorl.wordpress.com/2010/11/11/cve-2010-4160-linux-kernel-l2tp-integer-overflows/
- http://secunia.com/advisories/42801
- http://secunia.com/advisories/42890
- http://secunia.com/advisories/42932
- http://secunia.com/advisories/43056
- http://secunia.com/advisories/43291
- http://www.securityfocus.com/bid/44762
- http://www.vupen.com/english/advisories/2011/0012
- http://www.vupen.com/english/advisories/2011/0124
- http://www.vupen.com/english/advisories/2011/0213
- http://www.vupen.com/english/advisories/2011/0375
- https://bugzilla.redhat.com/show_bug.cgi?id=651892
- http://www.redhat.com/support/errata/RHSA-2011-0007.html
- http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00001.html
- http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00007.html
- http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00002.html
- http://www.spinics.net/lists/netdev/msg145248.html
- http://www.spinics.net/lists/netdev/msg145673.html
- http://openwall.com/lists/oss-security/2010/11/10/5
- http://openwall.com/lists/oss-security/2010/11/10/16
- http://openwall.com/lists/oss-security/2010/11/24/12
- http://openwall.com/lists/oss-security/2010/11/24/4
- http://openwall.com/lists/oss-security/2010/11/24/5
- http://openwall.com/lists/oss-security/2010/11/24/6
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=253eacc070b114c2ec1f81b067d2fed7305467b0
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8acfe468b0384e834a303f08ebc4953d72fb690a
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36.2
- https://launchpad.net/bugs/cve/CVE-2010-4160
- https://rhn.redhat.com/errata/RHSA-2011-0007.html
- https://rhn.redhat.com/errata/RHSA-2011-0330.html
- https://access.redhat.com/security/cve/CVE-2010-4160
- http://git.kernel.org/linus/253eacc070b114c2ec1f81b067d2fed7305467b0
- http://git.kernel.org/linus/8acfe468b0384e834a303f08ebc4953d72fb690a
- https://security-tracker.debian.org/tracker/CVE-2010-4160
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-4160
- https://nvd.nist.gov/vuln/detail/CVE-2010-4160
- https://ubuntu.com/security/CVE-2010-4160
Frequently Asked Questions
What is the severity of CVE-2010-4160?
CVE-2010-4160 has a high severity level due to the potential for integer overflow vulnerabilities in the Linux kernel.
How do I fix CVE-2010-4160?
To fix CVE-2010-4160, update the Linux kernel to a version that addresses this vulnerability.
What systems are affected by CVE-2010-4160?
CVE-2010-4160 affects various versions of the Linux kernel and specific distributions such as Debian and openSUSE.
What type of vulnerability is CVE-2010-4160?
CVE-2010-4160 is classified as an integer overflow vulnerability affecting the PPPoL2TP and IPoL2TP protocols.
Can CVE-2010-4160 be exploited remotely?
Yes, CVE-2010-4160 can potentially be exploited remotely through crafted sendto() calls.
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