[USN-5651-2] strongSwan vulnerability
== Ubuntu Security Notice USN-5651-2 October 03, 2022 strongswan vulnerability == A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 ESM - Ubuntu 14.04 ESM Summary: strongSwan could be made do denial of service if it received a specially crafted certificate. Software Description: - strongswan: IPsec VPN solution Details: USN-5651-1 fixed a vulnerability in strongSwan. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. Original advisory details: Lahav Schlesinger discovered that strongSwan incorrectly handled certain OCSP URIs and and CRL distribution points (CDP) in certificates. A remote attacker could possibly use this issue to initiate IKE_SAs and send crafted certificates that contain URIs pointing to servers under their control, which can lead to a denial-of-service attack. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 ESM: libstrongswan 5.3.5-1ubuntu3.8+esm3 strongswan 5.3.5-1ubuntu3.8+esm3 Ubuntu 14.04 ESM: libstrongswan 5.1.2-0ubuntu2.11+esm3 strongswan 5.1.2-0ubuntu2.11+esm3 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5651-2 https://ubuntu.com/security/notices/USN-5651-1 CVE-2022-40617 signature.asc Description: PGP signature
[USN-5651-1] strongSwan vulnerability
== Ubuntu Security Notice USN-5651-1 October 03, 2022 strongswan vulnerability == A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS Summary: strongSwan could be made do denial of service if it received a specially crafted certificate. Software Description: - strongswan: IPsec VPN solution Details: Lahav Schlesinger discovered that strongSwan incorrectly handled certain OCSP URIs and and CRL distribution points (CDP) in certificates. A remote attacker could possibly use this issue to initiate IKE_SAs and send crafted certificates that contain URIs pointing to servers under their control, which can lead to a denial-of-service attack. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS: libstrongswan 5.9.5-2ubuntu2.1 strongswan 5.9.5-2ubuntu2.1 Ubuntu 20.04 LTS: libstrongswan 5.8.2-1ubuntu3.5 strongswan 5.8.2-1ubuntu3.5 Ubuntu 18.04 LTS: libstrongswan 5.6.2-1ubuntu2.9 strongswan 5.6.2-1ubuntu2.9 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5651-1 CVE-2022-40617 Package Information: https://launchpad.net/ubuntu/+source/strongswan/5.9.5-2ubuntu2.1 https://launchpad.net/ubuntu/+source/strongswan/5.8.2-1ubuntu3.5 https://launchpad.net/ubuntu/+source/strongswan/5.6.2-1ubuntu2.9 signature.asc Description: PGP signature
[USN-5652-1] Linux kernel (Azure) vulnerabilities
== Ubuntu Security Notice USN-5652-1 October 03, 2022 linux-azure vulnerabilities == A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 ESM - Ubuntu 14.04 ESM Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-azure: Linux kernel for Microsoft Azure Cloud systems Details: It was discovered that the framebuffer driver on the Linux kernel did not verify size limits when changing font or screen size, leading to an out-of- bounds write. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-33655) Domingo Dirutigliano and Nicola Guerrera discovered that the netfilter subsystem in the Linux kernel did not properly handle rules that truncated packets below the packet header size. When such rules are in place, a remote attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-36946) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 ESM: linux-image-4.15.0-1151-azure 4.15.0-1151.166~16.04.1 linux-image-azure 4.15.0.1151.138 Ubuntu 14.04 ESM: linux-image-4.15.0-1151-azure 4.15.0-1151.166~14.04.1 linux-image-azure 4.15.0.1151.120 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-5652-1 CVE-2021-33655, CVE-2022-36946 OpenPGP_signature Description: OpenPGP digital signature
