linux kernel 2.6.27.21 and prior multiple vulnerabilities

2009.10.22
Credit: Josh Bressers
Risk: High
Local: No
Remote: Yes
CWE: CWE-399


CVSS Base Score: 7.8/10
Impact Subscore: 6.9/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: None
Integrity impact: None
Availability impact: Complete

Executing ping -f -s 3000 IP in a certain network setup could trigger an out-of-IOMMU error, leading to a denial of service. Steps to reproduce the issue: https://bugzilla.redhat.com/show_bug.cgi?id=529137#c0 Triggering the issue would result in: PCI-DMA: Out of IOMMU space for 7222 bytes at device 0000:03:00.0 PCI-DMA: Out of IOMMU space for 7222 bytes at device 0000:03:00.0 <Repeated Many Many Times> PCI-DMA: Out of IOMMU space for 7222 bytes at device 0000:03:00.0 PCI-DMA: Out of IOMMU space for 7222 bytes at device 0000:03:00.0 HARDWARE ERROR CPU 0: Machine Check Exception: 7 Bank 4: bc0000000005001b RIP 10:<ffffffff8006b2b0> {default_idle+0x29/0x50} TSC 10116da2355 ADDR 4000000 MISC c008000001000000 This is not a software problem! Run through mcelog --ascii to decode and contact your hardware vendor Kernel panic - not syncing: Uncorrected machine check <7>APIC error on CPU2: 00(08) Upstream commits: http://git.kernel.org/linus/a866bbf6aacf95f849810079442a20be118ce905 http://git.kernel.org/linus/97d477a914b146e7e6722ded21afa79886ae8ccd References: http://bugzilla.kernel.org/show_bug.cgi?id=9468 https://bugzilla.redhat.com/show_bug.cgi?id=529137 Thanks, Eugene

References:

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a866bbf6aacf95f849810079442a20be118ce905
https://bugzilla.redhat.com/show_bug.cgi?id=529137
http://www.securityfocus.com/bid/36706
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27.22
http://marc.info/?l=oss-security&m=125561712529352&w=2
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=97d477a914b146e7e6722ded21afa79886ae8ccd
http://bugzilla.kernel.org/show_bug.cgi?id=9468


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