USN-4632-1: SLiRP vulnerabilities

Releases

• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• slirp - SLIP/PPP emulator using a dial up shell account

Details

It was discovered that the SLiRP networking implementation of the QEMU
emulator did not properly manage memory under certain circumstances. An
attacker could use this to cause a heap-based buffer overflow or other out-
of-bounds access, which can lead to a denial of service (application crash)
or potentially execute arbitrary code. (CVE-2020-7039)

It was discovered that the SLiRP networking implementation of the QEMU
emulator misuses snprintf return values. An attacker could use this to
cause a denial of service (application crash) or potentially execute
arbitrary code. (CVE-2020-8608)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 18.04

• slirp - 1:1.0.17-8ubuntu18.04.1

Ubuntu 16.04

• slirp - 1:1.0.17-8ubuntu16.04.1

In general, a standard system update will make all the necessary changes.

References

• CVE-2020-7039
• CVE-2020-8608

Related notices

• USN-4283-1: qemu-system-sparc, qemu-user-binfmt, qemu-block-extra, qemu-system-misc, qemu-system-x86, qemu-system-gui, qemu-kvm, qemu-system-mips, qemu-system, qemu-user, qemu, qemu-system-s390x, qemu-system-common, qemu-system-aarch64, qemu-system-ppc, qemu-system-arm, qemu-system-data, qemu-guest-agent, qemu-utils, qemu-user-static