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TITLE:
KVM qemu-kvm virtio-blk Driver Buffer Overflow Vulnerabilities

SECUNIA ADVISORY ID:
SA44132

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/44132/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=44132

RELEASE DATE:
2011-04-27

DISCUSS ADVISORY:
http://secunia.com/advisories/44132/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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 * Impact
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 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/44132/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=44132

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http://secunia.com/vulnerability_scanning/personal/
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DESCRIPTION:
Some vulnerabilities have been reported in KVM qemu-kvm, which can be
exploited by malicious, local users in a guest system to cause a DoS
(Denial of Service) and potentially gain escalated privileges.

The vulnerabilities are caused due to boundary errors within the
"virtio_blk_handle_write()" and "virtio_blk_handle_read()" functions
in hw/virtio-blk.c, which can be exploited to cause a buffer overflow
by sending specially crafted read or write requests to the virtio-blk
driver.

The vulnerabilities are reported in version 0.14.0. Other versions
may also be affected.

SOLUTION:
Fixed in the GIT repository.

Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

PROVIDED AND/OR DISCOVERED BY:
Conor Murphy

ORIGINAL ADVISORY:
http://lists.gnu.org/archive/html/qemu-devel/2011-03/msg03015.html
http://git.kernel.org/?p=virt/kvm/qemu-kvm.git;a=commitdiff;h=52c050236eaa4f0b5e1d160cd66dc18106445c4d

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

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