Vulnerability in Apache HTTP Server
CVE-2016-1546
The Apache HTTP Server 2.4.17 and 2.4.18, when mod_http2 is enabled, does not limit the number of simultaneous stream workers for a single HTTP/2 connection, which allows remote attackers to cause a denial of service (stream-processing outage) via modified flow-control windows.
EPSS: 0.153 (96.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Apache Http_server — versions 2.4.17, 2.4.18
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cret@cert.org (vdb-entry, x_refsource_BID)
- cret@cert.org (x_refsource_CONFIRM, Patch, Vendor Advisory)
- cret@cert.org (vendor-advisory, x_refsource_GENTOO)
- cret@cert.org (x_refsource_REDHAT, vendor-advisory)
- cret@cert.org (x_refsource_CONFIRM)
- cret@cert.org (x_refsource_CONFIRM)
- cret@cert.org (x_refsource_CONFIRM)
- cret@cert.org (x_refsource_CONFIRM)
- cret@cert.org (x_refsource_CONFIRM)
- cret@cert.org (mailing-list, x_refsource_MLIST)
Frequently asked questions
- What is CVE-2016-1546?
- CVE-2016-1546 is a medium-severity vulnerability in Apache HTTP Server, classified under CWE-399. CVSS score: 5.9/10. Published 2016-07-06.
- How severe is CVE-2016-1546?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2016-1546 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.