Information disclosure in Apache HTTP Server
CVE-2017-9788
In Apache httpd before 2.2.34 and 2.4.x before 2.4.27, the value placeholder in [Proxy-]Authorization headers of type 'Digest' was not initialized or reset before or between successive key=value assignments by mod_auth_digest. Providing an initial key with no '=' assignment could reflect the stale value of uninitialized pool memory used by the prior request, leading to leakage of potentially confidential information, and a segfault in other cases resulting in denial of service.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.568 (99.1th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.568 · newest: 0.568 · change: 0.000
Affected products
- Apache HTTP Server
- Apache Software Foundation HTTP Server — versions 2.2.0 to 2.2.33, 2.4.1 to 2.4.26
- Apple Mac OS X
- NetApp Oncommand Unified Manager
- NetApp Storage Automation Store
- Oracle Secure Global Desktop — versions 5.3
- Debian Linux — versions 8.0, 9.0
- Red Hat Enterprise Linux — versions 6.0, 7.0
- Red Hat Enterprise Linux Desktop — versions 6.0, 7.0
- Red Hat Enterprise Linux Server — versions 6.0, 7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2017:3113 (vendor-advisory, Third Party Advisory)
- support.apple.com/HT208221 (Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2479 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2483 (vendor-advisory, Third Party Advisory)
- support.hpe.com/hpsc/doc/public/display (Third Party Advisory)
- httpd.apache.org/security/vulnerabilities_22.html (Vendor Advisory)
- security.netapp.com/advisory/ntap-20170911-0002/ (Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:3240 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2709 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:3195 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-9788?
- CVE-2017-9788 is a critical-severity vulnerability in Apache HTTP Server, classified under Improper Input Validation. CVSS score: 9.1/10. Published 2017-07-13.
- How severe is CVE-2017-9788?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2017-9788 known to be exploited?
- 65 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.