Recently, a security researcher disclosed a heap-based buffer overflow vulnerability (CVE-2019-14378) in the SLiRP networking backend in the QEMU emulator. An attacker could exploit this vulnerability to crash the QEMU process on a host machine, resulting in a denial of service, or possibly execute arbitrary code with privileges of the QEMU process.
Successful exploitation of this vulnerability requires bypassing ASLR and PIE. Besides, full exploitation is more difficult than the VENOM attack, but the researcher’s proof-of-concept video demonstrates it by opening a GNOME Calculator process on the host machine from a shell script inside QEMU.
Currently, a related exploit is already available. The QEMU team has fixed this vulnerability in its latest releases.
- QEMU V4.1.0, V4.1.0-rc5, and V4.1.0-rc4
- Other vendors, including SUSE and Debian, have also released fixed versions for their affected products. For details, see the following solution.
Currently, the QEMU team has officially released the latest versions to fix this vulnerability. Users are advised to download an appropriate version and upgrade as soon as possible. The latest versions are available at the following links:
SUSE provides fixed versions for its affected products. For details, visit the following link:
Debian provides fixed versions for its affected products. For details, visit the following link:
Red Hat lists products and versions affected by this vulnerability. For details, visit the following link:
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