open build service source server symlink exploitation via source patch

published 2018-03-02 8 y ago modified 2026-06-17 4 mo ago also EUVD-2015-0809

cvss: 6.3; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 58%
public exploits: 0; none known

In open buildservice 2.6 before 2.6.3, 2.5 before 2.5.7 and 2.4 before 2.4.8 the source service patch application could generate non-standard files like symlinks or device nodes, which could allow buildservice users to break of confinement or cause denial of service attacks on the source service.

Patch / fix

fixed in 1 links 1

SUSE open build service 2.4.8, 2.5.7, 2.6.3

github.com/openSUSE/open-build-service@474a3db commit

Exploit prediction

0.86% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.0	6.3	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
NVD	3.0	7.8	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	4.6	AV:L/AC:L/Au:N/C:P/I:P/A:P

Affected products

SUSE open build service

Classification

Weakness

CWE-434 Unrestricted Upload of File with Dangerous Type
CWE-59 Improper Link Resolution Before File Access

References

Sources

CVE List CVE-2015-0796
NVD CVE-2015-0796

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.

Summary