CVE-2021-21250
OneDev XML External Entity Expansion (Arbitrary File Read)
Description
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.
INFO
Published Date :
Jan. 15, 2021, 9:15 p.m.
Last Modified :
Jan. 21, 2021, 2:28 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.0
Exploitability Score :
3.1
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-21250.
| URL | Resource |
|---|---|
| https://github.com/theonedev/onedev/commit/9196fd795e87dab069b4260a3590a0ea886e770f | Patch Third Party Advisory |
| https://github.com/theonedev/onedev/security/advisories/GHSA-9pph-8gfc-6w2r | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-21250 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-21250 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Jan. 21, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Changed Reference Type https://github.com/theonedev/onedev/commit/9196fd795e87dab069b4260a3590a0ea886e770f No Types Assigned https://github.com/theonedev/onedev/commit/9196fd795e87dab069b4260a3590a0ea886e770f Patch, Third Party Advisory Changed Reference Type https://github.com/theonedev/onedev/security/advisories/GHSA-9pph-8gfc-6w2r No Types Assigned https://github.com/theonedev/onedev/security/advisories/GHSA-9pph-8gfc-6w2r Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:onedev_project:onedev:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.3
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-21250 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-21250
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.07 }} 0.00%
score
0.29024
percentile