Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2018-5743— Limiting simultaneous TCP clients was ineffective

Quick assessment

Affected
ISC BIND 9
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ISC BIND是美国ISC公司的一套实现了DNS协议的开源软件。 ISC BIND中存在安全漏洞，该漏洞源于程序没有充分地限制TCP客户端同时连接的个数。攻击者可利用该漏洞耗尽文件描述符，影响网络连接和文件管理。以下版本受到影响：BIND 9.9.0版本至9.10.8-P1版本，9.11.0版本至9.11.6版本，9.12.0版本至9.12.4版本，9.14.0版本，9.13.0版本至9.13.7版本（9.13 development branch），BIND 9 Supported Preview E

AI Predicted 5.3 Difficulty: Moderate EPSS 6.46% · P94

Possible ATT&CK Techniques 1 AI

T1235
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2018-5743

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Limiting simultaneous TCP clients was ineffective
Source: CVE Program / CVE List V5
Vulnerability Description
By design, BIND is intended to limit the number of TCP clients that can be connected at any given time. The number of allowed connections is a tunable parameter which, if unset, defaults to a conservative value for most servers. Unfortunately, the code which was intended to limit the number of simultaneous connections contained an error which could be exploited to grow the number of simultaneous connections beyond this limit. Versions affected: BIND 9.9.0 -> 9.10.8-P1, 9.11.0 -> 9.11.6, 9.12.0 -> 9.12.4, 9.14.0. BIND 9 Supported Preview Edition versions 9.9.3-S1 -> 9.11.5-S3, and 9.11.5-S5. Versions 9.13.0 -> 9.13.7 of the 9.13 development branch are also affected. Versions prior to BIND 9.9.0 have not been evaluated for vulnerability to CVE-2018-5743.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
ISC BIND 安全漏洞
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中存在安全漏洞，该漏洞源于程序没有充分地限制TCP客户端同时连接的个数。攻击者可利用该漏洞耗尽文件描述符，影响网络连接和文件管理。以下版本受到影响：BIND 9.9.0版本至9.10.8-P1版本，9.11.0版本至9.11.6版本，9.12.0版本至9.12.4版本，9.14.0版本，9.13.0版本至9.13.7版本（9.13 development branch），BIND 9 Supported Preview E
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

Vendor Product Affected Versions CPE Subscribe
ISC BIND 9 BIND 9.9.0 -> 9.10.8-P1, 9.11.0 -> 9.11.6, 9.12.0 -> 9.12.4, 9.14.0. BIND 9 Supported Preview Edition versions 9.9.3-S1 -> 9.11.5-S3, and 9.11.5-S5. Versions 9.13.0 -> 9.13.7 of the 9.13 development branch are also affected. Versions prior to BIND 9.9.0 h -

II. Public POCs for CVE-2018-5743

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2018-5743

请登录查看更多情报信息。

Vendor Advisories for CVE-2018-5743 (1)

Other References for CVE-2018-5743 (2)

Same Patch Batch · ISC · 2019-10-09 · 9 CVEs total

CVE-2019-6469 BIND Supported Preview Edition can exit with an assertion failure if ECS is in use
CVE-2019-6471 A race condition when discarding malformed packets can cause BIND to exit with an assertio
CVE-2018-5732 A specially constructed response from a malicious server can cause a buffer overflow in dh
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

IV. Related Vulnerabilities

Same product: BIND 9
Same vendor: ISC

V. Comments for CVE-2018-5743

No comments yet

Leave a comment