CVE-2010-2955: Infoleak
First published: Mon Aug 30 2010(Updated: )
Description of problem: This problem was originally tracked down by Brad Spengler. When calling wireless ioctls, if a driver does not correctly validate/shrink iwp->length, the resulting copy_to_user can leak up to 64K of kernel heap contents. It seems that this is triggerable[1] in 2.6.32 at least on ath5k, but I was not able to track down how. The twisty maze of ioctl handlers stumped me. :) Other drivers I checked did not appear to have any problems, but the potential remains. I'm not sure if this patch is the right approach; it was fixed differently[2] in grsecurity. [1] <a href="http://forums.grsecurity.net/viewtopic.php?f=3&t=2290&start=0">http://forums.grsecurity.net/viewtopic.php?f=3&t=2290&start=0</a> [2] <a href="http://grsecurity.net/~spender/wireless-infoleak-fix2.patch">http://grsecurity.net/~spender/wireless-infoleak-fix2.patch</a> Discussion: <a href="http://lkml.org/lkml/2010/8/27/413">http://lkml.org/lkml/2010/8/27/413</a>
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux-2.6 | ||
| Linux Linux kernel | <2.6.36 | |
| Linux Linux kernel | =2.6.36 | |
| Linux Linux kernel | =2.6.36-rc1 | |
| Linux Linux kernel | =2.6.36-rc2 | |
| openSUSE openSUSE | =11.1 | |
| SUSE Linux Enterprise Desktop | =11 | |
| Suse Linux Enterprise Real Time Extension | =11-sp1 | |
| SUSE Linux Enterprise Server | =11 | |
| Canonical Ubuntu Linux | =6.06 | |
| Canonical Ubuntu Linux | =8.04 | |
| Canonical Ubuntu Linux | =9.04 | |
| Canonical Ubuntu Linux | =9.10 | |
| Canonical Ubuntu Linux | =10.04 | |
| Canonical Ubuntu Linux | =10.10 |
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Reference Links
- http://grsecurity.net/~spender/wireless-infoleak-fix2.patch
- http://forums.grsecurity.net/viewtopic.php?f=3&t=2290
- http://secunia.com/advisories/41245
- http://www.securityfocus.com/bid/42885
- http://www.vupen.com/english/advisories/2011/0298
- https://bugzilla.redhat.com/show_bug.cgi?id=628434
- http://www.redhat.com/support/errata/RHSA-2010-0771.html
- http://www.redhat.com/support/errata/RHSA-2010-0842.html
- http://lists.opensuse.org/opensuse-security-announce/2010-11/msg00000.html
- http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html
- http://www.ubuntu.com/usn/USN-1000-1
- http://lkml.org/lkml/2010/8/27/413
- http://lkml.org/lkml/2010/8/30/351
- http://lkml.org/lkml/2010/8/30/127
- http://lkml.org/lkml/2010/8/30/146
- http://www.openwall.com/lists/oss-security/2010/08/31/1
- http://git.kernel.org/?p=linux/kernel/git/linville/wireless-2.6.git%3Ba=commit%3Bh=42da2f948d949efd0111309f5827bf0298bcc9a4
- http://www.kernel.org/pub/linux/kernel/v2.6/next/patch-v2.6.36-rc3-next-20100831.bz2
- https://launchpad.net/bugs/cve/CVE-2010-2955
- http://forums.grsecurity.net/viewtopic.php?f=3&t=2290&start=0
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=442035&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=442035&action=edit
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=628434
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=442177&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=442177&action=edit
- http://people.redhat.com/linville/kernels/rhel6/
- http://git.kernel.org/?p=linux/kernel/git/linville/wireless-2.6.git;a=commitdiff;h=42da2f948d949efd0111309f5827bf0298bcc9a4
- https://rhn.redhat.com/errata/RHSA-2010-0771.html
- https://rhn.redhat.com/errata/RHSA-2010-0842.html
- https://security-tracker.debian.org/tracker/CVE-2010-2955
- http://forums.grsecurity.net/viewtopic.php?f=3&t=2290
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-2955
- https://nvd.nist.gov/vuln/detail/CVE-2010-2955
- https://ubuntu.com/security/CVE-2010-2955
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