Apache httpd allows remote attackers to read secret data from process memory if the Limit directive can be set in a user's .htaccess file, or if httpd.conf has certain misconfigurations, aka Optionsbleed. This affects the Apache HTTP Server through 2.2.34 and 2.4.x through 2.4.27. The attacker sends an unauthenticated OPTIONS HTTP request when attempting to read secret data. This is a use-after-free issue and thus secret data is not always sent, and the specific data depends on many factors including configuration. Exploitation with .htaccess can be blocked with a patch to the ap_limit_section function in server/core.c.
                
            Metrics
Affected Vendors & Products
Advisories
    | Source | ID | Title | 
|---|---|---|
  Debian DLA | 
                DLA-1102-1 | apache2 security update | 
  Debian DSA | 
                DSA-3980-1 | apache2 security update | 
  Ubuntu USN | 
                USN-3425-1 | Apache HTTP Server vulnerability | 
  Ubuntu USN | 
                USN-3425-2 | Apache HTTP Server vulnerability | 
Fixes
    Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
        History
                    No history.
Status: PUBLISHED
Assigner: apache
Published:
Updated: 2024-08-05T17:18:01.870Z
Reserved: 2017-06-21T00:00:00
Link: CVE-2017-9798
No data.
Status : Deferred
Published: 2017-09-18T15:29:00.307
Modified: 2025-04-20T01:37:25.860
Link: CVE-2017-9798
                        OpenCVE Enrichment
                    No data.
 Debian DLA
 Debian DSA
 Ubuntu USN