CVE-2019-5747

HIGH
7.5
CVSS Score
Published: January 9, 2019 at 04:00 PM UTC
Updated: June 17, 2026 at 02:38 AM UTC
2 products affected across 2 vendorsUbuntu LinuxBusyBox

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Severity
HIGH7.5
Exploit prediction
EPSS 5%
SSVC
No known exploit

Description

An issue was discovered in BusyBox through 1.30.0. An out of bounds read in udhcp components (consumed by the DHCP client, server, and/or relay) might allow a remote attacker to leak sensitive information from the stack by sending a crafted DHCP message. This is related to assurance of a 4-byte length when decoding DHCP_SUBNET. NOTE: this issue exists because of an incomplete fix for CVE-2018-20679.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (6)

Mailing Listx_refsource_FULLDISCThird Party Advisory
http://seclists.org/fulldisclosure/2019/Sep/7
x_refsource_MISCExploitIssue TrackingThird Party Advisory
https://bugs.busybox.net/show_bug.cgi?id=11506
Mailing Listx_refsource_BUGTRAQThird Party Advisory
https://seclists.org/bugtraq/2019/Sep/7
Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
https://usn.ubuntu.com/3935-1/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-125

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