Debian Security Advisory DSA 3045-1 (qemu - security update)

Summary
Several vulnerabilities were discovered in qemu, a fast processor emulator: Various security issues have been found in the block qemu drivers. Malformed disk images might result in the execution of arbitrary code.A NULL pointer dereference in SLIRP may result in denial of serviceAn information leak was discovered in the VGA emulation
Solution
For the stable distribution (wheezy), these problems have been fixed in version 1.1.2+dfsg-6a+deb7u4. For the unstable distribution (sid), these problems will be fixed soon. We recommend that you upgrade your qemu packages.
Insight
QEMU is a fast processor emulator: currently the package supports ARM, CRIS, i386, M68k (ColdFire), MicroBlaze, MIPS, PowerPC, SH4, SPARC and x86-64 emulation. By using dynamic translation it achieves reasonable speed while being easy to port on new host CPUs. QEMU has two operating modes:
Affected
qemu on Debian Linux
Detection
This check tests the installed software version using the apt package manager.
References