Multiple heap-based buffer overflows in the cirrus_invalidate_region function in the Cirrus VGA extension in QEMU 0.8.2, as used in Xen and possibly other products, might allow local users to execute arbitrary code via unspecified vectors related to "attempting to mark non-existent regions as dirty," aka the "bitblt" heap overflow.

CVE-2014-8106

Heap-based buffer overflow in the Cirrus VGA emulator (hw/display/cirrus_vga.c) in QEMU before 2.2.0 allows local guest users to execute arbitrary code via vectors related to blit regions.
NOTE: this vulnerability exists because an incomplete fix for CVE-2007-1320.

CVE-2015-3209 Heap-based buffer overflow in the PCNET controller in QEMU allows remote attackers to execute arbitrary code by sending a packet with TXSTATUS_STARTPACKET set and then a crafted packet with TXSTATUS_DEVICEOWNS set.

CVE-2015-5165 The C+ mode offload emulation in the RTL8139 network card device model in QEMU, as used in Xen 4.5.x and earlier, allows remote attackers to read process heap memory via unspecified vectors.

CVE-2015-5279 Heap-based buffer overflow in the ne2000_receive function in hw/net/ne2000.c in QEMU before 2.4.0.1 allows guest OS users to cause a denial of service (instance crash) or possibly execute arbitrary code via vectors related to receiving packets.

CVE-2015-7504 Heap-based buffer overflow in the pcnet_receive function in hw/net/pcnet.c in QEMU allows guest OS administrators to cause a denial of service (instance crash) or possibly execute arbitrary code via a series of packets in loopback mode.

CVE-2015-7512 Buffer overflow in the pcnet_receive function in hw/net/pcnet.c in QEMU, when a guest NIC has a larger MTU, allows remote attackers to cause a denial of service (guest OS crash) or execute arbitrary code via a large packet.

Impact

An attacker may be able to cause a denial of service (DoS) or execute arbitrary code if using the virtual drivers specified in these CVE descriptions.

The remote Oracle Linux 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2007-0323 advisory.

    [3.0.3-25.0.4.el5]
     - QEmu cirrus bitblit bounds check - CVE-2007-1320 (rhbz #296271)
     - QEmu NE2000 overflow check - CVE-2007-1321 (rhbz #296271)
     - Pygrub guest escape - CVE-2007-4993 (rhbz #302821)

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

- Tue Nov 11 2008 Glauber Costa <glommer at redhat.com> -     74-6

    - Fix cirrus vulnerability (CVE-2008-4539) - #471055

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Detail :

Joris van Rantwijk found a flaw in the Pygrub utility which is used as a boot loader for guest domains. A malicious local administrator of a guest domain could create a carefully crafted grub.conf file which would trigger the execution of arbitrary code outside of that domain.
(CVE-2007-4993)

Tavis Ormandy discovered a heap overflow flaw during video-to-video copy operations in the Cirrus VGA extension code used in Xen. A malicious local administrator of a guest domain could potentially trigger this flaw and execute arbitrary code outside of the domain.
(CVE-2007-1320)

Tavis Ormandy discovered insufficient input validation leading to a heap overflow in the Xen NE2000 network driver. If the driver is in use, a malicious local administrator of a guest domain could potentially trigger this flaw and execute arbitrary code outside of the domain. Xen does not use this driver by default. (CVE-2007-1321)

An updated Xen package to fix multiple security issues is now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The Xen package contains the tools for managing the virtual machine monitor in Red Hat Enterprise Linux virtualization.

The following security flaws are fixed in the updated Xen package :

Joris van Rantwijk found a flaw in the Pygrub utility which is used as a boot loader for guest domains. A malicious local administrator of a guest domain could create a carefully crafted grub.conf file which would trigger the execution of arbitrary code outside of that domain.
(CVE-2007-4993)

Tavis Ormandy discovered a heap overflow flaw during video-to-video copy operations in the Cirrus VGA extension code used in Xen. A malicious local administrator of a guest domain could potentially trigger this flaw and execute arbitrary code outside of the domain.
(CVE-2007-1320)

Tavis Ormandy discovered insufficient input validation leading to a heap overflow in the Xen NE2000 network driver. If the driver is in use, a malicious local administrator of a guest domain could potentially trigger this flaw and execute arbitrary code outside of the domain. Xen does not use this driver by default. (CVE-2007-1321)

Users of Xen should update to these erratum packages containing backported patches which correct these issues.

Rogue VNC clients could make the built in VNC server of kvm run into an infinite loop (CVE-2008-2382)

An off-by-one bug limited the length of VNC passwords to seven instead of eight (CVE-2008-5714)

Virtualized guests could potentially execute code on the host by triggering a buffer overflow in the network emulation code via large ethernet frames (CVE-2007-5729)

Virtualized guests could potentially execute code on the host by triggering a heap based buffer overflow in the Cirrus Graphics card emulation (CVE-2007-1320).

Multiple vulnerabilities have been found in Qemu.

Multiple heap-based buffer overflows in the cirrus_invalidate_region function in the Cirrus VGA extension in QEMU 0.8.2, as used in Xen and possibly other products, might allow local users to execute arbitrary code via unspecified vectors related to attempting to mark non-existent regions as dirty, aka the bitblt heap overflow.
(CVE-2007-1320)

Integer signedness error in the NE2000 emulator in QEMU 0.8.2, as used in Xen and possibly other products, allows local users to trigger a heap-based buffer overflow via certain register values that bypass sanity checks, aka QEMU NE2000 receive integer signedness error.
(CVE-2007-1321)

QEMU 0.8.2 allows local users to halt a virtual machine by executing the icebp instruction. (CVE-2007-1322)

QEMU 0.8.2 allows local users to crash a virtual machine via the divisor operand to the aam instruction, as demonstrated by aam 0x0, which triggers a divide-by-zero error. (CVE-2007-1366)

The NE2000 emulator in QEMU 0.8.2 allows local users to execute arbitrary code by writing Ethernet frames with a size larger than the MTU to the EN0_TCNT register, which triggers a heap-based buffer overflow in the slirp library, aka NE2000 mtu heap overflow.
(CVE-2007-5729)

Heap-based buffer overflow in QEMU 0.8.2, as used in Xen and possibly other products, allows local users to execute arbitrary code via crafted data in the net socket listen option, aka QEMU net socket heap overflow. (CVE-2007-5730)

QEMU 0.9.0 allows local users of a Windows XP SP2 guest operating system to overwrite the TranslationBlock (code_gen_buffer) buffer, and probably have unspecified other impacts related to an overflow, via certain Windows executable programs, as demonstrated by qemu-dos.com.
(CVE-2007-6227)

Qemu 0.9.1 and earlier does not perform range checks for block device read or write requests, which allows guest host users with root privileges to access arbitrary memory and escape the virtual machine.
(CVE-2008-0928)

Changing removable media in QEMU could trigger a bug similar to CVE-2008-2004, which would allow local guest users to read arbitrary files on the host by modifying the header of the image to identify a different format. (CVE-2008-1945) See the diskformat: parameter to the
-usbdevice option.

The drive_init function in QEMU 0.9.1 determines the format of a raw disk image based on the header, which allows local guest users to read arbitrary files on the host by modifying the header to identify a different format, which is used when the guest is restarted.
(CVE-2008-2004) See the -format option.

The updated packages have been patched to fix these issues.

This library allows to manipulate XML files. It includes support to read, modify and write XML and HTML files. There is DTDs support this includes parsing and validation even with complex DtDs, either at parse time or later once the document has been modified. The output can be a simple SAX stream or and in-memory DOM like representations.
In this case one can use the built-in XPath and XPointer implementation to select subnodes or ranges. A flexible Input/Output mechanism is available, with existing HTTP and FTP modules and combined to an URI library.

Update Information:

Fixes a couple of security issues when overflowing text data size of buffer size.

----------------------------------------------------------------------
---------- ChangeLog :

  - Mon Dec 22 2008 Glauber Costa <gcosta at redhat.com> -     65-15.fc9

    - Fixed CVE-2008-2382.

    - Thu Dec 4 2008 Glauber Costa <gcosta at redhat.com> -       65-14.fc9

    - Fixed bug that corrupted gnome-panel #474702

    - Tue Dec 2 2008 Glauber Costa <gcosta at redhat.com> -       65-12.fc9

    - Properly set flags for interrupt return #464304

    - Tue Nov 11 2008 Glauber Costa <gcosta at redhat.com> -       65-11.fc9

    - Fix CVE-2008-4539 #448525

    - Mon Oct 13 2008 Glauber Costa <gcosta at redhat.com> -       65-10.fc9

    - Fix sysenter save in 64-bit hosts #457649

    - Thu Aug 28 2008 Glauber Costa <gcosta at redhat.com> -       65-9.fc9

    - there's already a 65-8 tag

    - Thu Aug 28 2008 Glauber Costa <gcosta at redhat.com> -       65-8.fc9

    - Fixes #459778

    - Fixes #452355

    - Tue May 27 2008 Glauber Costa <gcosta at redhat.com> -       65-7.fc9

    - Fix the build

    - Tue May 27 2008 Glauber Costa <gcosta at redhat.com> -       65-6.fc9

    - Fix Cirrus heap overflow vulnerability (#448525)

    - Fri May 23 2008 Daniel P. Berrange <berrange at       redhat.com> - 65-5.fc9

    - Put PTY in rawmode

    - Tue May 20 2008 Mark McLoughlin <markmc at redhat.com>
      - 65-4.fc9

    - Re-enable patch to fix -kernel with virtio/extboot       drives (#444578)

    - Fri May 16 2008 Glauber Costa <gcosta at redhat.com> -       65-3.fc9

    - Fix problem with cirrus device that was breaking vnc       connections (rhbz #446830)

    - Tue Apr 29 2008 Mark McLoughlin <markmc at redhat.com>
      - 65-2

    - Fix -kernel with virtio/extboot drives (#444578)

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This bug was reopened, since it was found out that it is still biting us.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

- Tue May 27 2008 Glauber Costa <gcosta at redhat.com> -     60-6.fc8

    - Fix Cirrus heap overflow vulnerability (#448524)

    - Fri May 23 2008 Daniel P. Berrange <berrange at       redhat.com> - 60-5.fc8

    - Put PTY in rawmode

    - Fri May 16 2008 Glauber Costa <gcosta at redhat.com> -       60-4.fc8

    - Fix problem with cirrus device that was breaking vnc       connections (rhbz #446830)

    - Wed Feb 27 2008 Daniel P. Berrange <berrange at       redhat.com> - 60-3.fc8

    - Fix block device checks for extendable disk formats       (rhbz #434978)

    - Sat Feb 23 2008 Daniel P. Berrange <berrange at       redhat.com> - 60-2.fc8

    - Fix block device extents check (rhbz #433560)

    - Thu Jan 31 2008 Jeremy Katz <katzj at redhat.com>

    - We don't need e2fsprogs-devel to build anymore       (#331871)

    - Thu Jan 24 2008 Daniel P. Berrange <berrange at       redhat.com> - 60-1.fc9

    - Updated to kvm-60

    - Fix license tag to keep rpmlint quiet

    - Remove unused PPC, Sparc and PPC Video BIOS

    - Tue Jan 15 2008 Bill Nottingham <notting at       redhat.com>: - 59-1

    - add upstream patch to fix VMs that no longer boot       (#427317)

    - update to kvm-59

    - Thu Dec 27 2007 Jeremy Katz <katzj at redhat.com> -       58-2

    - Fix up defaults patch to apply

    - Thu Dec 27 2007 Jeremy Katz <katzj at redhat.com> -       58-1

    - Update to kvm-58

    - Thu Dec 13 2007 Jeremy Katz <katzj at redhat.com> -       56-1

    - Update to kvm-56

    - Tue Dec 4 2007 Jeremy Katz <katzj at redhat.com> -       55-1

    - Update to kvm-55

    - Mon Dec 3 2007 Jeremy Katz <katzj at redhat.com> -       54-1

    - update to kvm-54

    - Tue Nov 20 2007 Jeremy Katz <katzj at redhat.com> -       53-1

    - update to kvm-53

    - Wed Nov 7 2007 Jeremy Katz <katzj at redhat.com> -       51-1

    - update to kvm-51

    - Tue Nov 6 2007 Jeremy Katz <katzj at redhat.com> -       50-1

    - update to kvm-50, drop all the patches that have gone       upstream

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

- Tue May 27 2008 Glauber Costa <gcosta at redhat.com> -     65-7.fc9

    - Fix the build

    - Tue May 27 2008 Glauber Costa <gcosta at redhat.com> -       65-6.fc9

    - Fix Cirrus heap overflow vulnerability (#448525)

    - Fri May 23 2008 Daniel P. Berrange <berrange at       redhat.com> - 65-5.fc9

    - Put PTY in rawmode

    - Tue May 20 2008 Mark McLoughlin <markmc at redhat.com>
      - 65-4.fc9

    - Re-enable patch to fix -kernel with virtio/extboot       drives (#444578)

    - Fri May 16 2008 Glauber Costa <gcosta at redhat.com> -       65-3.fc9

    - Fix problem with cirrus device that was breaking vnc       connections (rhbz #446830)

    - Tue Apr 29 2008 Mark McLoughlin <markmc at redhat.com>
      - 65-2

    - Fix -kernel with virtio/extboot drives (#444578)

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Tavis Ormandy discovered a heap overflow flaw during video-to-video copy operations in the Cirrus VGA extension code that is used in Xen.
A malicious local administrator of a guest domain could potentially trigger this flaw and execute arbitrary code outside of the domain (CVE-2007-1320).

Tavis Ormandy also discovered insufficient input validation leading to a heap overflow in the NE2000 network driver in Xen. If the driver is in use, a malicious local administrator of a guest domain could potentially trigger this flaw and execute arbitrary code outside of the domain (CVE-2007-1321, CVE-2007-5729, CVE-2007-5730).

Steve Kemp found that xen-utils used insecure temporary files within the xenmon tool that could allow local users to truncate arbitrary files (CVE-2007-3919).

Joris van Rantwijk discovered a flaw in Pygrub, which is used as a boot loader for guest domains. A malicious local administrator of a guest domain could create a carefully-crafted grub.conf file which could trigger the execution of arbitrary code outside of that domain (CVE-2007-4993).

Updated packages have been patched to prevent these issues.

Fixes a security flaw in pygrub handling of config files and a denial-of-service case in ne2k NIC for QEMU.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Several local vulnerabilities have been discovered in the Xen hypervisor packages which may lead to the execution of arbitrary code.
The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2007-4993     By use of a specially crafted grub configuration file a     domU user may be able to execute arbitrary code upon the     dom0 when pygrub is being used.

  - CVE-2007-1320     Multiple heap-based buffer overflows in the Cirrus VGA     extension, provided by QEMU, may allow local users to     execute arbitrary code via 'bitblt' heap overflow.

Several vulnerabilities have been discovered in the QEMU processor emulator, which may lead to the execution of arbitrary code or denial of service. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2007-1320     Tavis Ormandy discovered that a memory management     routine of the Cirrus video driver performs insufficient     bounds checking, which might allow the execution of     arbitrary code through a heap overflow.

  - CVE-2007-1321     Tavis Ormandy discovered that the NE2000 network driver     and the socket code perform insufficient input     validation, which might allow the execution of arbitrary     code through a heap overflow.

  - CVE-2007-1322     Tavis Ormandy discovered that the 'icebp' instruction     can be abused to terminate the emulation, resulting in     denial of service.

  - CVE-2007-1323     Tavis Ormandy discovered that the NE2000 network driver     and the socket code perform insufficient input     validation, which might allow the execution of arbitrary     code through a heap overflow.

  - CVE-2007-1366     Tavis Ormandy discovered that the 'aam' instruction can     be abused to crash qemu through a division by zero,     resulting in denial of service.

The Debian Security Team reports :

Several vulnerabilities have been discovered in the QEMU processor emulator, which may lead to the execution of arbitrary code or denial of service. The Common Vulnerabilities and Exposures project identifies the following problems :

CVE-2007-1320Tavis Ormandy discovered that a memory management routine of the Cirrus video driver performs insufficient bounds checking, which might allow the execution of arbitrary code through a heap overflow.

CVE-2007-1321Tavis Ormandy discovered that the NE2000 network driver and the socket code perform insufficient input validation, which might allow the execution of arbitrary code through a heap overflow.

CVE-2007-1322Tavis Ormandy discovered that the 'icebp' instruction can be abused to terminate the emulation, resulting in denial of service.

CVE-2007-1323Tavis Ormandy discovered that the NE2000 network driver and the socket code perform insufficient input validation, which might allow the execution of arbitrary code through a heap overflow.

CVE-2007-1366Tavis Ormandy discovered that the 'aam' instruction can be abused to crash qemu through a division by zero, resulting in denial of service.

ID	Name	Product	Family	Severity
88770	F5 Networks BIG-IP : Multiple QEMU vulnerabilities (K63519101)	Nessus	F5 Networks Local Security Checks	critical
67486	Oracle Linux 5 : Important: / xen (ELSA-2007-0323)	Nessus	Oracle Linux Local Security Checks	high
62274	Fedora 10 : kvm-74-6.fc10 (2008-10083)	Nessus	Fedora Local Security Checks	high
60261	Scientific Linux Security Update : xen on SL5.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	high
43639	CentOS 5 : xen (CESA-2007:0323)	Nessus	CentOS Local Security Checks	high
40254	openSUSE Security Update : kvm (kvm-412)	Nessus	SuSE Local Security Checks	high
40019	openSUSE Security Update : kvm (kvm-412)	Nessus	SuSE Local Security Checks	high
37509	Mandriva Linux Security Advisory : qemu (MDVSA-2008:162)	Nessus	Mandriva Local Security Checks	high
37490	Fedora 10 2008-10000	Nessus	Fedora Local Security Checks	critical
35266	Fedora 9 : kvm-65-15.fc9 (2008-11705)	Nessus	Fedora Local Security Checks	high
34749	Fedora 8 : kvm-60-7.fc8 (2008-9556)	Nessus	Fedora Local Security Checks	high
32467	Fedora 8 : kvm-60-6.fc8 (2008-4604)	Nessus	Fedora Local Security Checks	high
32461	Fedora 9 : kvm-65-7.fc9 (2008-4386)	Nessus	Fedora Local Security Checks	high
27614	Mandrake Linux Security Advisory : xen (MDKSA-2007:203)	Nessus	Mandriva Local Security Checks	high
26933	Fedora Core 6 : xen-3.0.3-12.fc6 (2007-713)	Nessus	Fedora Local Security Checks	high
26931	Debian DSA-1384-1 : xen-utils - several vulnerabilities	Nessus	Debian Local Security Checks	high
26903	RHEL 5 : xen (RHSA-2007:0323)	Nessus	Red Hat Local Security Checks	high
25151	Debian DSA-1284-1 : qemu - several vulnerabilities	Nessus	Debian Local Security Checks	high
25129	FreeBSD : qemu -- several vulnerabilities (0ac89b39-f829-11db-b55c-000e0c6d38a9)	Nessus	FreeBSD Local Security Checks	high

Detections

Analytics

CVE-2007-1320

high

Tenable Plugins

critical

high

high

high

high

high

high

high

critical

high

high

high

high

high

high

high

high

high

high