low
2.1
CWE
476
Advisory Published
CVE Published
Updated

CVE-2014-3640: Null Pointer Dereference

First published: Sun Sep 21 2014(Updated: )

The sosendto function in slirp/udp.c in QEMU before 2.1.2 allows local users to cause a denial of service (NULL pointer dereference) by sending a udp packet with a value of 0 in the source port and address, which triggers access of an uninitialized socket.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Debian GNU/Linux=7.0
QEMU KVM=2.0.0
QEMU KVM=2.0.0-rc0
QEMU KVM=2.0.0-rc1
QEMU KVM=2.0.0-rc2
QEMU KVM=2.0.0-rc3
QEMU KVM=2.0.2
QEMU KVM=2.1.0
QEMU KVM=2.1.0-rc0
QEMU KVM=2.1.0-rc1
QEMU KVM=2.1.0-rc2
QEMU KVM=2.1.0-rc3
QEMU KVM=2.1.0-rc5
QEMU KVM=2.1.1
redhat enterprise Linux desktop=7.0
Red Hat Enterprise Linux HPC Node=7.0
redhat enterprise Linux server=7.0
redhat enterprise Linux workstation=7.0
Ubuntu Linux=10.04
Ubuntu Linux=12.04
Ubuntu Linux=14.04
Ubuntu Linux=14.10

Remedy

http://lists.nongnu.org/archive/html/qemu-devel/2014-09/msg03543.html

Remedy

http://lists.nongnu.org/archive/html/qemu-devel/2014-09/msg04598.html

Remedy

http://lists.nongnu.org/archive/html/qemu-devel/2014-09/msg04707.html

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2014-3640?

    CVE-2014-3640 is classified as a denial of service vulnerability due to a NULL pointer dereference.

  • How do I fix CVE-2014-3640?

    To mitigate CVE-2014-3640, you should upgrade QEMU to version 2.1.2 or later.

  • Who is affected by CVE-2014-3640?

    CVE-2014-3640 affects QEMU versions prior to 2.1.2 as well as certain versions of Debian and Red Hat Enterprise Linux.

  • What type of vulnerability is CVE-2014-3640?

    CVE-2014-3640 is a denial of service vulnerability that can be exploited by sending specially crafted UDP packets.

  • Can CVE-2014-3640 be exploited remotely?

    CVE-2014-3640 is primarily a local exploit, as it requires local user access to send crafted UDP packets.

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