Headline
Ubuntu Security Notice USN-6488-2
Ubuntu Security Notice 6488-2 - USN-6488-1 fixed a vulnerability in strongSwan. This update provides the corresponding updates for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. Florian Picca discovered that strongSwan incorrectly handled certain DH public values. A remote attacker could use this issue to cause strongSwan to crash, resulting in a denial of service, or possibly execute arbitrary code.
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Ubuntu Security Notice USN-6488-2
December 14, 2023
strongswan vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
Summary:
strongSwan could be made to crash or run programs if it received
specially crafted network traffic.
Software Description:
- strongswan: IPsec VPN solution
Details:
USN-6488-1 fixed a vulnerability in strongSwan. This update provides
the corresponding updates for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.
Original advisory details:
Florian Picca discovered that strongSwan incorrectly handled certain DH
public values. A remote attacker could use this issue to cause strongSwan
to crash, resulting in a denial of service, or possibly execute arbitrary
code.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS (Available with Ubuntu Pro):
libstrongswan 5.6.2-1ubuntu2.9+esm1
strongswan 5.6.2-1ubuntu2.9+esm1
Ubuntu 16.04 LTS (Available with Ubuntu Pro):
libstrongswan 5.3.5-1ubuntu3.8+esm4
strongswan 5.3.5-1ubuntu3.8+esm4
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-6488-2
https://ubuntu.com/security/notices/USN-6488-1
CVE-2023-41913
Related news
strongSwan before 5.9.12 has a buffer overflow and possible unauthenticated remote code execution via a DH public value that exceeds the internal buffer in charon-tkm's DH proxy. The earliest affected version is 5.3.0. An attack can occur via a crafted IKE_SA_INIT message.
Debian Linux Security Advisory 5560-1 - Florian Picca reported a bug the charon-tkm daemon in strongSwan an IKE/IPsec suite.
Ubuntu Security Notice 6488-1 - Florian Picca discovered that strongSwan incorrectly handled certain DH public values. A remote attacker could use this issue to cause strongSwan to crash, resulting in a denial of service, or possibly execute arbitrary code.