CVE-2012-4536
published 2012-11-21CVE-2012-4536: The (1) domain_pirq_to_emuirq and (2) physdev_unmap_pirq functions in Xen 2.2 allows local guest OS administrators to cause a denial of service (Xen crash) via…
PriorityP49low2.1CVSS 2.0
AVLACLAuNCNINAP
EPSS
0.42%
34.0th percentile
The (1) domain_pirq_to_emuirq and (2) physdev_unmap_pirq functions in Xen 2.2 allows local guest OS administrators to cause a denial of service (Xen crash) via a crafted pirq value that triggers an out-of-bounds read.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | xen | < xen 4.1.3-4 (bookworm) | xen 4.1.3-4 (bookworm) |
| xen | xen | — | — |
| xen | xen | >= 0 < 4.1.3-4 | 4.1.3-4 |
| xen | xen | >= 0 < 4.1.3-4 | 4.1.3-4 |
| xen | xen | >= 0 < 4.1.3-4 | 4.1.3-4 |
| xen | xen | >= 0 < 4.1.3-4 | 4.1.3-4 |
CVSS provenance
nvdv2.02.1LOWAV:L/AC:L/Au:N/C:N/I:N/A:P
osv2.1LOW
vendor_debian2.1LOW
vendor_redhat2.1LOW
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GHSA
GHSA-75wr-64hp-88pq: The (1) domain_pirq_to_emuirq and (2) physdev_unmap_pirq functions in Xen 2
ghsa_unreviewed·2022-05-17
CVE-2012-4536 [LOW] GHSA-75wr-64hp-88pq: The (1) domain_pirq_to_emuirq and (2) physdev_unmap_pirq functions in Xen 2
The (1) domain_pirq_to_emuirq and (2) physdev_unmap_pirq functions in Xen 2.2 allows local guest OS administrators to cause a denial of service (Xen crash) via a crafted pirq value that triggers an out-of-bounds read.
OSV
CVE-2012-4536: The (1) domain_pirq_to_emuirq and (2) physdev_unmap_pirq functions in Xen 2
osv·2012-11-21·CVSS 2.1
CVE-2012-4536 [LOW] CVE-2012-4536: The (1) domain_pirq_to_emuirq and (2) physdev_unmap_pirq functions in Xen 2
The (1) domain_pirq_to_emuirq and (2) physdev_unmap_pirq functions in Xen 2.2 allows local guest OS administrators to cause a denial of service (Xen crash) via a crafted pirq value that triggers an out-of-bounds read.
Red Hat
kernel: xen: PIRQ unmap missing range check causes hypervisor crash
vendor_redhat·2012-11-13·CVSS 2.1
CVE-2012-4536 [LOW] kernel: xen: PIRQ unmap missing range check causes hypervisor crash
kernel: xen: PIRQ unmap missing range check causes hypervisor crash
The (1) domain_pirq_to_emuirq and (2) physdev_unmap_pirq functions in Xen 2.2 allows local guest OS administrators to cause a denial of service (Xen crash) via a crafted pirq value that triggers an out-of-bounds read.
Statement: Not vulnerable.
This issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5.
This issue did not affect Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG as we did not have support for Xen hypervisor.
Package: kernel-xen (Red Hat Enterprise Linux 5) - Not affected
Debian
CVE-2012-4536: xen - The (1) domain_pirq_to_emuirq and (2) physdev_unmap_pirq functions in Xen 2.2 al...
vendor_debian·2012·CVSS 2.1
CVE-2012-4536 [LOW] CVE-2012-4536: xen - The (1) domain_pirq_to_emuirq and (2) physdev_unmap_pirq functions in Xen 2.2 al...
The (1) domain_pirq_to_emuirq and (2) physdev_unmap_pirq functions in Xen 2.2 allows local guest OS administrators to cause a denial of service (Xen crash) via a crafted pirq value that triggers an out-of-bounds read.
Scope: local
bookworm: resolved (fixed in 4.1.3-4)
bullseye: resolved (fixed in 4.1.3-4)
forky: resolved (fixed in 4.1.3-4)
sid: resolved (fixed in 4.1.3-4)
trixie: resolved (fixed in 4.1.3-4)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2012-4536 kernel: xen: PIRQ unmap missing range check causes hypervisor crash [fedora-all]
bugzilla·2012-11-13·CVSS 2.1
CVE-2012-4536 [LOW] CVE-2012-4536 kernel: xen: PIRQ unmap missing range check causes hypervisor crash [fedora-all]
CVE-2012-4536 kernel: xen: PIRQ unmap missing range check causes hypervisor crash [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When creating a Bodhi update request, please use the bodhi submission link
noted in the next comment(s). This will include the bug IDs of this
tracking bug as well as the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
Bodhi notes field when available.
Please not
Bugzilla
CVE-2012-4536 kernel: xen: PIRQ unmap missing range check causes hypervisor crash
bugzilla·2012-10-25·CVSS 2.1
CVE-2012-4536 [LOW] CVE-2012-4536 kernel: xen: PIRQ unmap missing range check causes hypervisor crash
CVE-2012-4536 kernel: xen: PIRQ unmap missing range check causes hypervisor crash
domain_pirq_to_emuirq() uses the guest provided pirq value before range checking it, and physdev_unmap_pirq uses domain_pirq_to_emuirq without checking the pirq value either. Invalid pirq values can cause Xen to read out of array bounds, usually resulting in a fatal page fault.
A malicious guest administrator can cause Xen to crash. If the out of array bounds access does not crash, the arbitrary value read will be ignored due to later error checking, so there is no privilege escalation and no exploitable information leak.
Acknowledgements:
Red Hat would like to thank the Xen project for reporting this issue.
Discussion:
In RHEL5, physdev_unmap_pirq calls unmap_domain_pirq which does the range check.
--
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2012-11-21
Published