CVE-2019-9516
MEDIUM severity · CVSS 6.5 · Uncontrolled resource consumption
6.5CVSS MEDIUM
Summary
Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a denial of service. The attacker sends a stream of headers with a 0-length header name and 0-length header value, optionally Huffman encoded into 1-byte or greater headers. Some implementations allocate memory for these headers and keep the allocation alive until the session dies. This can consume excess memory.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)2%
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products we track (3)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00035.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00014.htmlAdvisory
- http://seclists.org/fulldisclosure/2019/Aug/16Advisory
- https://access.redhat.com/errata/RHSA-2019:2745Advisory
- https://access.redhat.com/errata/RHSA-2019:2746Advisory
- https://access.redhat.com/errata/RHSA-2019:2775Advisory