Resource exhaustion in Isc Bind
CVE-2019-6477
With pipelining enabled each incoming query on a TCP connection requires a similar resource allocation to a query received via UDP or via TCP without pipelining enabled. A client using a TCP-pipelined connection to a server could consume m…
Vulnerability class: DoS (Denial of Service)
EPSS: 0.040 (89.5th 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:N/I:N/A:H.
Affected products
- Isc Bind — versions 9.11.5, 9.11.6, 9.11.12
- Isc Bind9 — versions 9.11.6-P1 -> 9.11.12, 9.12.4-P1 -> 9.12.4-P2, 9.14.1 -> 9.14.7, and versions 9.11.5-S6 -> 9.11.12-S1 of BIND 9 Supported Preview Edition. Versions 9.15.0 -> 9.15.5 of the BIND 9.15 development branch are also affected
- Fedoraproject Fedora — versions 30, 31
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-officer@isc.org (x_refsource_CONFIRM, Third Party Advisory)
- security-officer@isc.org (x_refsource_CONFIRM, Third Party Advisory)
- security-officer@isc.org (x_refsource_FEDORA, vendor-advisory)
- security-officer@isc.org (x_refsource_CONFIRM)
- security-officer@isc.org (x_refsource_FEDORA, vendor-advisory)
- security-officer@isc.org (vendor-advisory, x_refsource_DEBIAN)
- security-officer@isc.org (vendor-advisory, x_refsource_SUSE)
- security-officer@isc.org (vendor-advisory, x_refsource_SUSE)
Frequently asked questions
- What is CVE-2019-6477?
- CVE-2019-6477 is a high-severity vulnerability in Isc Bind, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2019-11-26.
- How severe is CVE-2019-6477?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2019-6477 known to be exploited?
- 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.