Vulnerability Details : CVE-2021-3639
A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly. This issue could be used by an attacker to facilitate phishing attacks by tricking users into visiting a trusted web application URL that redirects to an external and potentially malicious server. The highest threat from this liability is to confidentiality and integrity.
Vulnerability category: Open redirect
Products affected by CVE-2021-3639
- cpe:2.3:a:uninett:mod_auth_mellon:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-3639
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-2021-3639
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.1
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
2.8
|
2.7
|
NIST |
CWE ids for CVE-2021-3639
-
A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks.Assigned by:
- nvd@nist.gov (Secondary)
- secalert@redhat.com (Primary)
References for CVE-2021-3639
-
https://access.redhat.com/security/cve/CVE-2021-3639
CVE-2021-3639- Red Hat Customer PortalPatch;Third Party Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=1980648
1980648 – (CVE-2021-3639) CVE-2021-3639 mod_auth_mellon: Open Redirect vulnerability in logout URLsIssue Tracking;Third Party Advisory
-
https://github.com/latchset/mod_auth_mellon/commit/42a11261b9dad2e48d70bdff7c53dd57a12db6f5
Prevent redirect to URLs that begin with '///' · latchset/mod_auth_mellon@42a1126 · GitHubPatch;Third Party Advisory
Jump to