CVE-2020-13529

systemd is a system and service manager that runs as PID 1 and starts the rest of the system.

Security Fix(es):

An exploitable denial-of-service vulnerability exists in Systemd 245. A specially crafted DHCP FORCERENEW packet can cause a server running the DHCP client to be vulnerable to a DHCP ACK spoofing attack. An attacker can forge a pair of FORCERENEW and DCHP ACK packets to reconfigure the server.(CVE-2020-13529)

NetworkManager is a system network service that manages network devices and connections, attempting to keep active network connectivity when available. Its capabilities include managing Ethernet, wireless, mobile broadband (WWAN), and PPPoE devices, as well as providing VPN integration with a variety of different VPN services.

The following packages have been upgraded to a later upstream version: NetworkManager (1.32.10). (BZ#1934465)

Security Fix(es):

• systemd: DHCP FORCERENEW authentication not implemented can cause a system running the DHCP client to have its network reconfigured (CVE-2020-13529)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 8.5 Release Notes linked from the References section.

An exploitable denial-of-service vulnerability exists in Systemd 245. A specially crafted DHCP FORCERENEW packet can cause a server running the DHCP client to be vulnerable to a DHCP ACK spoofing attack. An attacker can forge a pair of FORCERENEW and DCHP ACK packets to reconfigure the server.

NetworkManager is a system network service that manages network devices and connections, attempting to keep active network connectivity when available. Its capabilities include managing Ethernet, wireless, mobile broadband (WWAN), and PPPoE devices, as well as providing VPN integration with a variety of different VPN services.

The following packages have been upgraded to a later upstream version: NetworkManager (1.32.10). (BZ#1934465)

Security Fix(es):

• systemd: DHCP FORCERENEW authentication not implemented can cause a system running the DHCP client to have its network reconfigured (CVE-2020-13529)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

• SECURITY UPDATE: DoS via DHCP FORCERENEW
  • debian/patches/CVE-2020-13529.patch: tentatively ignore FORCERENEW command in src/libsystemd-network/sd-dhcp-client.c.
  • CVE-2020-13529

This systemd update provides the v246.15 maintenance release and fixes at least the following security issues:

An exploitable denial-of-service vulnerability exists in Systemd 245. A specially crafted DHCP FORCERENEW packet can cause a server running the DHCP client to be vulnerable to a DHCP ACK spoofing attack. An attacker can forge a pair of FORCERENEW and DCHP ACK packets to reconfigure the server (CVE-2020-13529).

basic/unit-name.c in systemd 220 through 248 has a Memory Allocation with an Excessive Size Value (involving strdupa and alloca for a pathname controlled by a local attacker) that results in an operating system crash (CVE-2021-29270).

This update for systemd fixes the following issues:

• Updated to version 246.15
• CVE-2021-33910: Fixed a denial of service issue in systemd. (bsc#1188063)
• CVE-2020-13529: Fixed an issue that allows crafted DHCP FORCERENEW packet can cause a server running the DHCP client to be vulnerable to a DHCP ACK spoofing attack. (bsc#1185972)

These are all security issues fixed in the NetworkManager-1.32.10-2.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the libsystemd0-249.4-2.2 package on the GA media of openSUSE Tumbleweed.

This update for systemd fixes the following issues:

• Updated to version 246.15
• CVE-2021-33910: Fixed a denial of service issue in systemd. (bsc#1188063)
• CVE-2020-13529: Fixed an issue that allows crafted DHCP FORCERENEW packet can cause a server running the DHCP client to be vulnerable to a DHCP ACK spoofing attack. (bsc#1185972)

It was discovered that systemd incorrectly handled certain mount paths. A local attacker could possibly use this issue to cause systemd to crash, resulting in a denial of service. (CVE-2021-33910)

Mitchell Frank discovered that systemd incorrectly handled DHCP FORCERENEW packets. A remote attacker could possibly use this issue to reconfigure servers. (CVE-2020-13529)

USN-5013-1 fixed several vulnerabilities in systemd. This update provides the corresponding update for Ubuntu 16.04 ESM.

Original advisory details:

It was discovered that systemd incorrectly handled certain mount paths. A local attacker could possibly use this issue to cause systemd to crash, resulting in a denial of service. (CVE-2021-33910)

Mitchell Frank discovered that systemd incorrectly handled DHCP FORCERENEW packets. A remote attacker could possibly use this issue to reconfigure servers. (CVE-2020-13529)