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An out of bounds read was discovered in systemd-journald in the way it parses log messages that terminate with a colon ':'. A local attacker can use this flaw to disclose process memory data. Versions from v221 to v239 are vulnerable.

CVE-2018-16866 is a medium-severity vulnerability affecting systemd, specifically the systemd-journald component, versions from v221 to v239. The flaw is an out-of-bounds read (CWE-125) that occurs when systemd-journald parses log messages ending with a colon ':'. This improper parsing can lead to disclosure of process memory data (CWE-200), allowing a local attacker to read sensitive information from memory that should not be accessible. The vulnerability requires local access to the system, does not require privileges, and no user interaction is needed. The CVSS 3.0 base score is 4.3, reflecting limited impact primarily on confidentiality. The vulnerability does not affect integrity or availability. No known exploits are reported in the wild, and no official patches are linked in the provided data, though it is likely that later versions of systemd have addressed this issue. The vulnerability arises from unsafe memory handling in log message processing, which could be leveraged by an attacker with local access to extract sensitive data from running processes, potentially including credentials or other private information stored in memory buffers.

Detailed information about CVE-2018-16866: CWE-125 in The systemd Project systemd affecting The systemd Project systemd. Get real-time updates, technical detail

CVE-2018-16866: CWE-125 in The systemd Project systemd - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2018-16866: CWE-125 in The systemd Project systemd

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