CVE-2018-19044: keepalived Link Following
Vulnerability summary
CVE-2018-19044 is a medium (CVSS 4.7) Link Following vulnerability in keepalived. EPSS estimates a 0.50% chance of exploitation in the next 30 days, higher than 41.6% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 3 · Related 2Timeline
- 08-11-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · Red hatEcosystem advisory · calculated7.0HighCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HDiffers
- OSV · UbuntuEcosystem advisory · calculated4.7MediumCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
- OSV · DebianEcosystem advisory · calculated4.7MediumCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS trend
Probability
0.50%
Chance of exploitation in the next 30 days
Percentile
42%
Versus all other CVEs
30-day change
0.00 pp
From 0.50% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundKeepalived
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Redhat2 products
- keepalived< 0:1.3.5-16.el7
- keepalived-debuginfo< 0:1.3.5-16.el7
Debian1 product
- keepalived< 1:2.0.10-1
Keepalived1 product
- keepalived2.0.8
Ubuntu1 product
- keepalivedAll versions (No fix recorded)
4 vendors · 5 products
References
15 links- github.com/acassen/keepalived/commit/04f2d32871bb3b11d7dc024039952f2fe2750306X Refsource MISCPatchThird Party Advisory
