Ubuntu Security Notice 5009-2 - USN-5009-1 fixed vulnerabilities in libslirp. This update provides the corresponding updates for Ubuntu 21.10. 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. 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. Various other issues were also addressed.
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Ubuntu Security Notice USN-5009-2
October 26, 2021
libslirp vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 21.10
Summary:
Several security issues were fixed in libslirp.
Software Description:
- 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)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 21.10:
libslirp0 4.4.0-1ubuntu0.21.10.1
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5009-2
https://ubuntu.com/security/notices/USN-5009-1
CVE-2021-3592, CVE-2021-3593, CVE-2021-3594, CVE-2021-3595
Package Information:
https://launchpad.net/ubuntu/+source/libslirp/4.4.0-1ubuntu0.21.10.1