Vulnerability Details : 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 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
Vulnerability category: Overflow
Products affected by CVE-2018-5732
- cpe:2.3:a:isc:dhcp:*:*:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:*:*:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:*:*:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:-:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r2:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r3:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r4:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r5:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r6:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1.2:p1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r10:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r12:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r7:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r8:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r9:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r11:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r13:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r14:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r15:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.4.0:*:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r10b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r10rc1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r11b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r11rc1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r11rc2:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r12-p1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r12b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r13b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r14b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r3b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r5b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r5rc1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r5rc2:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r8b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r8rc1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r9b1:*:*:*:*:*:*
- cpe:2.3:a:isc:dhcp:4.1-esv:r9rc1:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-5732
0.16%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 53 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-5732
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
Internet Systems Consortium (ISC) | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2018-5732
-
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-5732
-
https://kb.isc.org/docs/aa-01565
Vendor Advisory
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