Vulnerability Details : CVE-2021-21250
OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, there is a critical vulnerability which may lead to arbitrary file read. When BuildSpec is provided in XML format, the spec is processed by XmlBuildSpecMigrator.migrate(buildSpecString); which processes the XML document without preventing the expansion of external entities. These entities can be configured to read arbitrary files from the file system and dump their contents in the final XML document to be migrated. If the files are dumped in properties included in the YAML file, it will be possible for an attacker to read them. If not, it is possible for an attacker to exfiltrate the contents of these files Out Of Band. This issue was addressed in 4.0.3 by ignoring ENTITY instructions in xml file.
Products affected by CVE-2021-21250
- cpe:2.3:a:onedev_project:onedev:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-21250
0.07%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 29 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-21250
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.0
|
MEDIUM | AV:N/AC:L/Au:S/C:P/I:N/A:N |
8.0
|
2.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
2.8
|
3.6
|
NIST | |
|
7.7
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
3.1
|
4.0
|
GitHub, Inc. |
CWE ids for CVE-2021-21250
-
The product places sensitive information into files or directories that are accessible to actors who are allowed to have access to the files, but not to the sensitive information.Assigned by: security-advisories@github.com (Primary)
References for CVE-2021-21250
-
https://github.com/theonedev/onedev/security/advisories/GHSA-9pph-8gfc-6w2r
Post-Auth External Entity Expansion (XXE) · Advisory · theonedev/onedev · GitHubThird Party Advisory
-
https://github.com/theonedev/onedev/commit/9196fd795e87dab069b4260a3590a0ea886e770f
Fix XXE injection attack by disabling XML DTD handling · theonedev/onedev@9196fd7 · GitHubPatch;Third Party Advisory
Jump to