MGASA-2018-0494

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MGASA-2018-0494

Summary: Updated keepalived package fixes security vulnerabilities

Details: keepalived before version 2.0.9 didn't check for pathnames with symlinks when writing data to a temporary file upon a call to PrintData or PrintStats. This allowed local users to overwrite arbitrary files if fs.protected_symlinks is set to 0, as demonstrated by a symlink from /tmp/keepalived.data or /tmp/keepalived.stats to /etc/passwd (CVE-2018-19044). keepalived before version 2.0.9 used mode 0666 when creating new temporary files upon a call to PrintData or PrintStats, potentially leaking sensitive information (CVE-2018-19045). keepalived before version 2.0.10 didn't check for existing plain files when writing data to a temporary file upon a call to PrintData or PrintStats. If a local attacker had previously created a file with the expected name (e.g., /tmp/keepalived.data or /tmp/keepalived.stats), with read access for the attacker and write access for the keepalived process, then this potentially leaked sensitive information (CVE-2018-19046). keepalived before version 2.0.9 has a heap-based buffer overflow when parsing HTTP status codes resulting in DoS or possibly unspecified other impact, because extract_status_code in lib/html.c has no validation of the status code and instead writes an unlimited amount of data to the heap (CVE-2018-19115).

References: https://advisories.mageia.org/MGASA-2018-0494.html, https://bugs.mageia.org/show_bug.cgi?id=24063, https://lists.fedoraproject.org/archives/list/[email protected]/thread/6YQ7NS6S7B7V2X5NEUJKMTNXL3YPD7H3/