CVE-2021-3733
moderate-risk
Published 2022-03-10
There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.
Do I need to act?
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0.76% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10
Medium
NETWORK
/ LOW complexity
Affected Products (20)
Codeready Linux Builder For Ibm Z Systems
Codeready Linux Builder For Power Little Endian
Affected Vendors
References (17)
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1995234
Third Party Advisory
https://security.netapp.com/advisory/ntap-20220407-0001/
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1995234
Third Party Advisory
https://security.netapp.com/advisory/ntap-20220407-0001/
48
/ 100
moderate-risk
Severity
24/34 · High
Exploitability
3/34 · Minimal
Exposure
21/34 · High