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7.0High

CVE-2018-15686systemd: reexec state injection: fgets() on overlong lines leads to line splitting

systemd systemd Published: (8 years ago)

Description

A vulnerability in unit_deserialize of systemd allows an attacker to supply arbitrary state across systemd re-execution via NotifyAccess. This can be used to improperly influence systemd execution and possibly lead to root privilege escalation. Affected releases are systemd versions up to and including 239.

Weakness (CWE): CWE-502

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

VendorProductVersions
systemd systemd unspecified – ≤ 239

References and patches

Recent CVEs in the same product — systemd

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In systemd 259, systemd-journald can send ANSI escape sequences to the terminals of arbitrary users when a "logger -p emerg" command is executed, if ForwardToWall=yes is set.

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In systemd 260 before 261, a local unprivileged user can trigger an assert via an IPC API call with an array or map that has a null element.

6.4Medium
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In nspawn in systemd 233 through 259 before 260, an escape-to-host action can occur via a crafted optional config file.

6.4Medium
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In udev in systemd before 260, local root execution can occur via malicious hardware devices and unsanitized kernel output.

6.7Medium
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In systemd 259 before 260, there is local privilege escalation in systemd-machined because varlink can be used to reach the root namespace.

4.7Medium
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In systemd 258 before 260, a local unprivileged user can trigger an assert when a Delegate=yes and User=<unset> unit exists and is running.