CVE-2018-5732 (GCVE-0-2018-5732)

Vulnerability from cvelistv5 – Published: 2019-10-09 14:17 – Updated: 2024-09-16 18:19
VLAI
Title
A specially constructed response from a malicious server can cause a buffer overflow in dhclient
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
Severity
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • Affected versions of dhclient should crash due to an out-of-bounds memory access if they receive and process a triggering response packet. However, buffer overflow outcomes can vary by operating system, and outcomes such as remote code execution may be possible in some circumstances. Where they are present, operating system mitigation strategies such as address space layout randomization (ASLR) should make it difficult to leverage this vulnerability to achieve remote code execution, but we cannot rule it out as impossible. The safest course is to patch dhclient so that the buffer overflow cannot occur.
Assigner
isc
References
URL Tags
https://kb.isc.org/docs/aa-01565 x_refsource_CONFIRM
Impacted products
Vendor Product Version
ISC ISC DHCP Affected: ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0
Create a notification for this product.
Date Public
2018-02-28 00:00
Credits
ISC would like to thank Felix Wilhelm, Google Security Team, for reporting this vulnerability.
Show details on NVD website
To clipboard 

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  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
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