CVE-2018-19044

medium

Description

keepalived 2.0.8 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.

References

https://access.redhat.com/errata/RHSA-2019:2285

https://bugzilla.suse.com/show_bug.cgi?id=1015141

https://github.com/acassen/keepalived/commit/04f2d32871bb3b11d7dc024039952f2fe2750306

https://github.com/acassen/keepalived/issues/1048

https://security.gentoo.org/glsa/201903-01

Details

Source: MITRE

Published: 2018-11-08

Updated: 2019-08-06

Type: CWE-59

Risk Information

CVSS v2

Base Score: 3.3

Vector: AV:L/AC:M/Au:N/C:N/I:P/A:P

Impact Score: 4.9

Exploitability Score: 3.4

Severity: LOW

CVSS v3

Base Score: 4.7

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

Impact Score: 3.6

Exploitability Score: 1

Severity: MEDIUM