7.5high
CVE-2018-5732
A specially constructed response from a malicious server can cause a buffer overflow in dhclient
Published 7 y ago · modified 4 mo ago · JSON
CVSS
7.5
v3.0 · CNA
CISA KEV
No
not known exploited
EPSS
5.2%
percentile 93%
Public exploits
0
none known
Summary
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
Exploit prediction (EPSS)
5.24% probability of exploitation in the next 30 days, higher than 93% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| CNA | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Affected products
- ISC ISC DHCP
Classification
- Weakness
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
- kb.isc.org /docs/aa-01565 · x_refsource_CONFIRM, x_transferred
Sources
- CVE List: CVE-2018-5732
- NVD: CVE-2018-5732
vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.