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CVE-2022-45873

Status Candidate

Overview

systemd 250 and 251 allows local users to achieve a systemd-coredump deadlock by triggering a crash that has a long backtrace. This occurs in parse_elf_object in shared/elf-util.c. The exploitation methodology is to crash a binary calling the same function recursively, and put it in a deeply nested directory to make its backtrace large enough to cause the deadlock. This must be done 16 times when MaxConnections=16 is set for the systemd/units/systemd-coredump.socket file.

Related Files

Ubuntu Security Notice USN-5928-1
Posted Mar 7, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5928-1 - It was discovered that systemd did not properly validate the time and accuracy values provided to the format_timespan function. An attacker could possibly use this issue to cause a buffer overrun, leading to a denial of service attack. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS. It was discovered that systemd did not properly manage the fs.suid_dumpable kernel configurations. A local attacker could possibly use this issue to expose sensitive information. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 22.10.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-3821, CVE-2022-4415, CVE-2022-45873
SHA-256 | 509bb5498c466727e8b77069e58b5b38ba7506e8a8d8e979018a2f971776f7e6
Red Hat Security Advisory 2023-0954-01
Posted Feb 28, 2023
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2023-0954-01 - The systemd packages contain systemd, a system and service manager for Linux, compatible with the SysV and LSB init scripts. It provides aggressive parallelism capabilities, uses socket and D-Bus activation for starting services, offers on-demand starting of daemons, and keeps track of processes using Linux cgroups. Issues addressed include an information leakage vulnerability.

tags | advisory
systems | linux, redhat
advisories | CVE-2022-4415, CVE-2022-45873
SHA-256 | d40b009d0296fcd2e2665767ca82b5437c147ddad50a10819f08dcd43f90259c
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