CVE-2017-9788
CRITICAL severity · CVSS 9.1 · Improper input validation
9.1CVSS CRITICAL
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)49%
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Affected products we track (2)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html ↗
Additional information
- NVD record
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlPatch
- http://www.debian.org/security/2017/dsa-3913Advisory
- http://www.securityfocus.com/bid/99569Advisory
- http://www.securitytracker.com/id/1038906Advisory
- https://access.redhat.com/errata/RHSA-2017:2478Advisory
- https://access.redhat.com/errata/RHSA-2017:2479Advisory
- https://access.redhat.com/errata/RHSA-2017:2483Advisory
- https://access.redhat.com/errata/RHSA-2017:2708Advisory