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Fencer Intel
medium 5.5

CVE-2017-11747 json

main.c in Tinyproxy 1.8.4 and earlier creates a /run/tinyproxy/tinyproxy.pid file after dropping privileges to a non-root account, which mi…

published 2017-07-30 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-3357

cvss
5.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits
0
none known

Summary

main.c in Tinyproxy 1.8.4 and earlier creates a /run/tinyproxy/tinyproxy.pid file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for tinyproxy.pid modification before a root script executes a "kill `cat /run/tinyproxy/tinyproxy.pid`" command.

Patch / fix

  • tinyproxy Debian 14, Debian 13, Debian 12 1.10.0-1

debian advisories DEBIAN-CVE-2017-11747

  • tinyproxy Ubuntu Pro 14.04 LTS 1.8.3-3ubuntu14.04.1~esm1
  • tinyproxy Ubuntu Pro 16.04 LTS 1.8.3-3ubuntu16.04.1~esm1
  • tinyproxy Ubuntu Pro 18.04 LTS 1.8.4-5ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2017-11747

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • tinyproxy openSUSE Tumbleweed 1.11.0-1.3
  • tinyproxy Package Hub 15 SP5, openSUSE Leap 15.5 1.11.2-bp155.3.3.1

opensuse advisories openSUSE-SU-2024:11465-1openSUSE-SU-2024:0119-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-11747 updated cvss 4.4

tinyproxy: Creating PID file after privileges dropping allows local DoS

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-269 Improper Privilege Management

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.