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USN-5009-2: libslirp vulnerabilities

26 October 2021

Several security issues were fixed in libslirp.

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Releases

Packages

  • libslirp - General purpose TCP-IP emulator library

Details

USN-5009-1 fixed vulnerabilities in libslirp. This update provides the
corresponding updates for Ubuntu 21.10.

Original advisory details:

Qiuhao Li discovered that libslirp incorrectly handled certain header data
lengths. An attacker inside a guest could possibly use this issue to leak
sensitive information from the host. This issue only affected Ubuntu 20.04
LTS and Ubuntu 20.10. (CVE-2020-29129, CVE-2020-29130)

It was discovered that libslirp incorrectly handled certain udp packets. An
attacker inside a guest could possibly use this issue to leak sensitive
information from the host. (CVE-2021-3592, CVE-2021-3593, CVE-2021-3594,
CVE-2021-3595)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 21.10

After a standard system update you need to reboot your computer to make
all the necessary changes.

Related notices

  • USN-5009-1: libslirp, libslirp0, libslirp-dev
  • USN-5010-1: qemu-user, qemu-system-arm, qemu-system, qemu-system-misc, qemu-block-extra, qemu-utils, qemu-system-data, qemu-system-s390x, qemu-system-x86, qemu-system-gui, qemu-kvm, qemu-system-sparc, qemu, qemu-user-binfmt, qemu-user-static, qemu-guest-agent, qemu-system-x86-microvm, qemu-system-mips, qemu-system-common, qemu-system-x86-xen, qemu-system-ppc