CVE-2019-6471— A race condition when discarding malformed packets can cause BIND to exit with an assertion failure
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I. Basic Information for CVE-2019-6471
Vulnerability Information
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Vulnerability Title
A race condition when discarding malformed packets can cause BIND to exit with an assertion failure
Source: NVD (National Vulnerability Database)
Vulnerability Description
A race condition which may occur when discarding malformed packets can result in BIND exiting due to a REQUIRE assertion failure in dispatch.c. Versions affected: BIND 9.11.0 -> 9.11.7, 9.12.0 -> 9.12.4-P1, 9.14.0 -> 9.14.2. Also all releases of the BIND 9.13 development branch and version 9.15.0 of the BIND 9.15 development branch and BIND Supported Preview Edition versions 9.11.3-S1 -> 9.11.7-S1.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
ISC BIND 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ISC BIND是美国ISC公司的一套实现了DNS协议的开源软件。 ISC BIND中存在竞争条件问题漏洞。该漏洞源于网络系统或产品在运行过程中，并发代码需要互斥地访问共享资源时，对于并发访问的处理不当。以下产品及版本受到影响：BIND 9.11.0版本至9.11.7，9.12.0版本至9.12.4-P1版本，9.14.0版本至9.14.2版本，BIND 9.13版本（development branch），BIND 9.15（development branch），BIND Supported Prev
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2019-6471
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- https://kb.isc.org/docs/cve-2019-6471x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2019-6471
Same Patch Batch · ISC · 2019-10-09 · 9 CVEs total
| CVE-2018-5732 | A specially constructed response from a malicious server can cause a buffer overflow in dh | |
| CVE-2018-5743 | Limiting simultaneous TCP clients was ineffective | |
| CVE-2018-5744 | A specially crafted packet can cause named to leak memory | |
| CVE-2018-5745 | An assertion failure can occur if a trust anchor rolls over to an unsupported key algorith | |
| CVE-2019-6465 | Zone transfer controls for writable DLZ zones were not effective | |
| CVE-2019-6467 | An error in the nxdomain redirect feature can cause BIND to exit with an INSIST assertion | |
| CVE-2019-6468 | BIND Supported Preview Edition can exit with an assertion failure if nxdomain-redirect is | |
| CVE-2019-6469 | BIND Supported Preview Edition can exit with an assertion failure if ECS is in use |
IV. Related Vulnerabilities
Same product: BIND 9
- CVE-2026-3591
A stack use-after-return flaw in SIG(0) handling code may en - CVE-2026-3119
Authenticated query containing a TKEY record may cause named - CVE-2026-3104
Memory leak in code preparing DNSSEC proofs of non-existence - CVE-2026-1519
Excessive NSEC3 iterations cause high CPU load during insecu - CVE-2025-13878
Malformed BRID/HHIT records can cause named to terminate une
Same vendor: ISC
- CVE-2026-3591
A stack use-after-return flaw in SIG(0) handling code may en - CVE-2026-3119
Authenticated query containing a TKEY record may cause named - CVE-2026-3104
Memory leak in code preparing DNSSEC proofs of non-existence - CVE-2026-1519
Excessive NSEC3 iterations cause high CPU load during insecu - CVE-2026-3608
Stack overflow in Kea daemons
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