Use After Free in Apache Http_server
CVE-2017-9798
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 Serve…
Vulnerability class: Use-After-Free
EPSS: 0.938 (99.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Apache Http_server — versions 2.4.0, 2.4.1, 2.4.2
- Apache Software Foundation Http Server — versions Apache HTTP Server through 2.2.34 and 2.4.x through 2.4.27
- Debian Debian_linux — versions 7.0, 8.0, 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@apache.org (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- security@apache.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- security@apache.org (x_refsource_CONFIRM, Patch, Third Party Advisory)
- security@apache.org (x_refsource_CONFIRM, Patch, Third Party Advisory)
- security@apache.org (x_refsource_CONFIRM, Patch, Third Party Advisory)
- security@apache.org (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- security@apache.org (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- security@apache.org (Technical Description, Exploit, Patch, Third Party Advisory, x_refsource_MISC)
- security@apache.org (x_refsource_CONFIRM, Third Party Advisory)
- security@apache.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK)
Frequently asked questions
- What is CVE-2017-9798?
- CVE-2017-9798 is a high-severity vulnerability in Apache Http_server, classified under Use After Free. CVSS score: 7.5/10. Published 2017-09-18.
- How severe is CVE-2017-9798?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2017-9798 known to be exploited?
- 54 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.