==========================================================================
Ubuntu Security Notice USN-4632-1
November 12, 2020
slirp vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 18.04 LTS
– Ubuntu 16.04 LTS
Summary:
slirp could be made to crash if it received specially crafted
input.
Software Description:
– 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 LTS:
slirp 1:1.0.17-8ubuntu18.04.1
Ubuntu 16.04 LTS:
slirp 1:1.0.17-8ubuntu16.04.1
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4632-1
CVE-2020-7039, CVE-2020-8608
Package Information:
https://launchpad.net/ubuntu/+source/slirp/1:1.0.17-8ubuntu18.04.1
https://launchpad.net/ubuntu/+source/slirp/1:1.0.17-8ubuntu16.04.1
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