CVE-2020-8021
unauthorized read access to files where sourceaccess is disabled via a crafted _service file in Open Build Service
a Improper Access Control vulnerability in of Open Build Service allows remote attackers to read files of an OBS package where the sourceaccess/access is disabled This issue affects: Open Build Service versions prior to 2.10.5.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
unauthorized read access to files where sourceaccess is disabled via a crafted _service file in Open Build Service
a Improper Access Control vulnerability in of Open Build Service allows remote attackers to read files of an OBS package where the sourceaccess/access is disabled This issue affects: Open Build Service versions prior to 2.10.5.
- Record
CVE-2020-8021- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-269
- Updated
- 2026-11-02
EUVDEUVD-2020-28934
a Improper Access Control vulnerability in of Open Build Service allows remote attackers to read files of an OBS package where the sourceaccess/access is disabled This issue affects: Open Build Service versions prior to 2.10.5.
- Record
EUVD-2020-28934- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4635-6x6c-c5r7 No score
a Improper Access Control vulnerability in of Open Build Service allows remote attackers to read...
a Improper Access Control vulnerability in of Open Build Service allows remote attackers to read files of an OBS package where the sourceaccess/access is disabled This issue affects: Open Build Service versions prior to 2.10.5.
- Record
GHSA-4635-6x6c-c5r7- Weakness
- CWE-269
- Updated
- 2026-11-02
NVD
a Improper Access Control vulnerability in of Open Build Service allows remote attackers to read files of an OBS package where the sourceaccess/access is disabled This issue affects: Open Build Service versions prior to 2.10.5.
- Record
CVE-2020-8021- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:P/I:N/A:N - Weakness
- CWE-269
- Updated
- 2026-11-02
OSV
a Improper Access Control vulnerability in of Open Build Service allows remote attackers to read files of an OBS package where the sourceaccess/access is disabled This issue affects: Open Build Service versions prior to 2.10.5.
- Record
CVE-2020-8021- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
OSVDEBIAN-CVE-2020-8021
a Improper Access Control vulnerability in of Open Build Service allows remote attackers to read files of an OBS package where the sourceaccess/access is disabled This issue affects: Open Build Service versions prior to 2.10.5.
- Record
DEBIAN-CVE-2020-8021- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-8021
a Improper Access Control vulnerability in of Open Build Service allows remote attackers to read files of an OBS package where the sourceaccess/access is disabled This issue affects: Open Build Service versions prior to 2.10.5.
- Record
UBUNTU-CVE-2020-8021- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-06
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
open-build-serviceDebian:12 |
before 2.9.4-4 | 2.9.4-4 |
open-build-serviceDebian:9 From an advisory covering 2 CVEs |
before 2.7.1-10+deb9u1, plus listed versions 2.7.1-10 |
2.7.1-10+deb9u1 |
obs-buildUbuntu:16.04:LTS |
All versions, plus listed versions 20141024-120141024-1.1 |
None known |
obs-buildUbuntu:18.04:LTS |
All versions, plus listed versions 20170201-3 |
None known |
obs-buildUbuntu:20.04:LTS |
All versions, plus listed versions 20180831-320180831-3ubuntu1 |
None known |
obs-buildUbuntu:22.04:LTS |
All versions, plus listed versions 20190710-120210120-1 |
None known |
obs-buildUbuntu:25.10 |
All versions, plus listed versions 20210120-4 |
None known |
obs-buildUbuntu:26.10 |
All versions, plus listed versions 20210120-4build1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected | OSV | |
| affected, facts | ||
| aliases, products, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-8021 is a medium vulnerability (CVSS 5.3) in Opensuse Open Build Service, published May 19, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.30%, the 70th percentile. Fixed in open-build-service 2.9.4-4.