OBS worker VM escape via relative symbolic links

Published 8 y ago 2018-03-01 · modified 4 mo ago 2026-06-17 · JSON

CVSS

5.0

v3.0 · CNA

CISA KEV

not known exploited

EPSS

1.1%

percentile 67%

Public exploits

none known

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.

Exploit prediction (EPSS)

1.15% probability of exploitation in the next 30 days, higher than 67% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
CNA	3.0	5.0	`CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N`
CNA	3.0	5.0	`CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N`
NVD	3.0	7.5	`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`
NVD	2.0	5.0	`AV:N/AC:L/Au:N/C:P/I:N/A:N`

Affected products

openSUSE open build service

Classification

Weakness

CWE-59 Improper Link Resolution Before File Access
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

github.com /openSUSE/open-build-service/commit/ba27c91351878bc297ec4baba0bd488a2f3b568d · x_refsource_CONFIRM, x_transferred
bugzilla.suse.com /show_bug.cgi?id=1029824 · x_refsource_CONFIRM, x_transferred
suse.com /de-de/security/cve/CVE-2017-5188/ · x_refsource_CONFIRM, x_transferred

Sources

CVE List: CVE-2017-5188
NVD: CVE-2017-5188

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