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CVE-2018-16866

Status Candidate

Overview

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.

Related Files

Debian Security Advisory 4367-1
Posted Jan 14, 2019
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4367-1 - The Qualys Research Labs discovered multiple vulnerabilities in systemd-journald. Two memory corruption flaws, via attacker-controlled alloca()s (CVE-2018-16864, CVE-2018-16865) and an out-of-bounds read flaw leading to an information leak (CVE-2018-16866), could allow an attacker to cause a denial of service or the execution of arbitrary code.

tags | advisory, denial of service, arbitrary, vulnerability
systems | linux, debian
advisories | CVE-2018-16864, CVE-2018-16865, CVE-2018-16866
MD5 | 52119bef744619b328f6429303d66914
Ubuntu Security Notice USN-3855-1
Posted Jan 11, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3855-1 - It was discovered that systemd-journald allocated variable-length buffers for certain message fields on the stack. A local attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. It was discovered that systemd-journald allocated variable-length arrays of objects representing message fields on the stack. A local attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, local
systems | linux, ubuntu
advisories | CVE-2018-16864, CVE-2018-16865, CVE-2018-16866
MD5 | 42433c95e77000de53479462231b8fa3
systemd-journald Memory Corruption / Information Leak
Posted Jan 9, 2019
Authored by Qualys Security Advisory

This is a thorough analysis of how Qualys approached exploiting three vulnerabilities in systemd-journald. Although they have not released formal exploits yet, they detail in here is useful in understanding the flaws.

tags | advisory, vulnerability
advisories | CVE-2018-16864, CVE-2018-16865, CVE-2018-16866
MD5 | 5e1ba71c0b7e7dbafebb77bbd2703730
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