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CVE-2018-5739— Failure to release memory may exhaust system resources

Quick assessment

Affected
ISC Kea DHCP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ISC Kea DHCP是美国Internet Systems Consortium公司的一款开源的DHCP服务器。该产品支持IPV4和IPV6地址的分配，并支持动态DNS更新。 ISC Kea DHCP 1.4.0版本中存在安全漏洞，该漏洞源于程序在临时存储客户端网络数据包后没有释放内存。攻击者可通过发送大量请求利用该漏洞造成DHCP服务器功能无法使用（内存耗尽）。

AI Predicted 5.3 Difficulty: Easy EPSS 1.89% · P79

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2018-5739

Vulnerability Information
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Vulnerability Title
Failure to release memory may exhaust system resources
Source: CVE Program / CVE List V5
Vulnerability Description
An extension to hooks capabilities which debuted in Kea 1.4.0 introduced a memory leak for operators who are using certain hooks library facilities. In order to support multiple requests simultaneously, Kea 1.4 added a callout handle store but unfortunately the initial implementation of this store does not properly free memory in every case. Hooks which make use of query4 or query6 parameters in their callouts can leak memory, resulting in the eventual exhaustion of available memory and subsequent failure of the server process. Affects Kea DHCP 1.4.0.
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 Kea DHCP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ISC Kea DHCP是美国Internet Systems Consortium公司的一款开源的DHCP服务器。该产品支持IPV4和IPV6地址的分配，并支持动态DNS更新。 ISC Kea DHCP 1.4.0版本中存在安全漏洞，该漏洞源于程序在临时存储客户端网络数据包后没有释放内存。攻击者可通过发送大量请求利用该漏洞造成DHCP服务器功能无法使用（内存耗尽）。
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 Kea DHCP Kea DHCP 1.4.0 -

II. Public POCs for CVE-2018-5739

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III. Intelligence Information for CVE-2018-5739

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Other References for CVE-2018-5739 (1)

Same Patch Batch · ISC · 2019-01-16 · 18 CVEs total

CVE-2017-3143 An error in TSIG authentication can permit unauthorized dynamic updates
CVE-2018-5741 Update policies krb5-subdomain and ms-subdomain do not enforce controls promised in their
CVE-2018-5740 A flaw in the "deny-answer-aliases" feature can cause an assertion failure in named
CVE-2018-5738 Some versions of BIND can improperly permit recursive query service to unauthorized client
CVE-2018-5737 BIND 9.12's serve-stale implementation can cause an assertion failure in rbtdb.c or other
CVE-2018-5734 A malformed request can trigger an assertion failure in badcache.c
CVE-2018-5733 A malicious client can overflow a reference counter in ISC dhcpd
CVE-2017-3145 Improper fetch cleanup sequencing in the resolver can cause named to crash
CVE-2017-3144 Failure to properly clean up closed OMAPI connections can exhaust available sockets
CVE-2016-9778 An error handling certain queries using the nxdomain-redirect feature could cause a REQUIR
CVE-2017-3142 An error in TSIG authentication can permit unauthorized zone transfers
CVE-2017-3141 Windows service and uninstall paths are not quoted when BIND is installed
CVE-2017-3140 An error processing RPZ rules can cause named to loop endlessly after handling a query
CVE-2017-3138 named exits with a REQUIRE assertion failure if it receives a null command string on its c
CVE-2017-3137 A response packet can cause a resolver to terminate when processing an answer containing a
CVE-2017-3136 An error handling synthesized records could cause an assertion failure when using DNS64 wi
CVE-2017-3135 Combination of DNS64 and RPZ Can Lead to Crash

IV. Related Vulnerabilities

Same vendor: ISC

V. Comments for CVE-2018-5739

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