High severity · published Oct 9, 2019
CVE-2018-5732
Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer overflow (and…
7.5
CVSS
5.2%
EPSS
No
On KEV
Description
Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer overflow (and resulting crash) in dhclient by sending a response containing a specially constructed options section. Affects ISC DHCP versions 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)5.2% · higher than 92% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DH
Dhcp · Isc
4.1.0 through 4.1.2; 4.2.0 before 4.2.8; 4.3.0 before 4.3.6; 4.1-esv; 4.1-esv; 4.1-esv; +32 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-5732
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-5732
Vendor Advisory
https://kb.isc.org/docs/aa-01565
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