CVE-2020-27304: Path Traversal
First published: Mon Oct 18 2021(Updated: )
The CivetWeb web library does not validate uploaded filepaths when running on an OS other than Windows, when using the built-in HTTP form-based file upload mechanism, via the mg_handle_form_request API. Web applications that use the file upload form handler, and use parts of the user-controlled filename in the output path, are susceptible to directory traversal
Credit: vuln@vdoo.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Civetweb Project Civetweb | >=1.8<1.15 | |
| Siemens Sinec Infrastructure Network Services | <1.0.1.1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
- https://groups.google.com/g/civetweb/c/yPBxNXdGgJQ
- https://jfrog.com/blog/cve-2020-27304-rce-via-directory-traversal-in-civetweb-http-server/
- https://github.com/civetweb/civetweb/commit/b2ed60c589172b37f3d705c69d84313eeb8348b1
- https://access.redhat.com/errata/RHSA-2021:4902
- https://access.redhat.com/security/cve/cve-2020-27304
- https://bugzilla.redhat.com/show_bug.cgi?id=2016640
- https://www.cve.org/CVERecord?id=CVE-2020-27304 https://nvd.nist.gov/vuln/detail/CVE-2020-27304 https://groups.google.com/g/civetweb/c/yPBxNXdGgJQ https://jfrog.com/blog/cve-2020-27304-rce-via-directory-traversal-in-civetweb-http-server/
Frequently Asked Questions
What is CVE-2020-27304?
CVE-2020-27304 is a remote code execution vulnerability found in CivetWeb (embeddable web server/library).
How does CVE-2020-27304 work?
CVE-2020-27304 allows an attacker to execute arbitrary code by not validating uploaded filepaths when using the built-in HTTP form-based file upload mechanism.
What is the severity of CVE-2020-27304?
CVE-2020-27304 has a severity rating of 9.8 (Critical).
Which software is affected by CVE-2020-27304?
CivetWeb version 1.15 and earlier, Civetweb Project Civetweb version 1.8 to 1.15, and Siemens Sinec Infrastructure Network Services version 1.0.1.1 are affected by CVE-2020-27304.
How can I remediate CVE-2020-27304?
Apply the recommended remedy of updating to CivetWeb version 1.15.
- agent/author
- agent/description
- agent/event
- agent/first-publish-date
- agent/last-modified-date
- agent/references
- agent/remedy
- agent/severity
- agent/softwarecombine
- agent/tags
- agent/type
- agent/weakness
- collector/nvd-index
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2020-27304
- agent/software-canonical-lookup
- collector/redhat-cve
- vendor/civetweb project
- canonical/civetweb project civetweb
- version/civetweb project civetweb/1.8
- vendor/siemens
- canonical/siemens sinec infrastructure network services
- package-manager/redhat