CVE-2017-5188

OBS worker VM escape via relative symbolic links

5.0 MediumFix available

The bs_worker code in open build service before 20170320 followed relative symlinks, allowing reading of files outside of the package source directory during build, allowing leakage of private information.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

1.15%Up 0.3 points since Apr 14, 2021

What each source reports

CVE List Score used 5.0

OBS worker VM escape via relative symbolic links

Record: CVE-2017-5188
CVSS 3.0: 5.0 MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Updated: 2026-11-02

EUVDEUVD-2017-14297 5.0

Record: EUVD-2017-14297
CVSS 3.0: 5.0 MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-m6v2-2pmh-qf44 7.5

The bs_worker code in open build service before 20170320 followed relative symlinks, allowing...

Record: GHSA-m6v2-2pmh-qf44
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

NVD 5.0

Record: CVE-2017-5188
CVSS 3.0: 5.0 MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness: CWE-59, CWE-200
Updated: 2026-11-02

OSV 7.5

Record: CVE-2017-5188
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

OSVDEBIAN-CVE-2017-5188 7.5

Record: DEBIAN-CVE-2017-5188
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2017-5188 5.0

Record: UBUNTU-CVE-2017-5188
CVSS 3.0: 5.0 MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`open-build-service` Debian:12	before 2.7.4-3	2.7.4-3
`open-build-service` Ubuntu:18.04:LTS	All versions, plus listed versions 2.7.4-2	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, products	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2017-5188 is a medium vulnerability (CVSS 5.0) in Opensuse Open Build Service, published March 1, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.15%, the 66th percentile. Fixed in open-build-service 2.7.4-3.