Home/CVE/An issue was discovered in BusyBox through 1.30.0. An out of bounds read in udhcp components (consumed by the DHCP clien
CVE

CVE-2019-5747

An issue was discovered in BusyBox through 1.30.0. An out of bounds read in udhcp components (consumed by the DHCP clien

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.

HIGH · CVSS 7.5 EPSS 0.00792
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-125Out-of-bounds Read
CWE-125Out-of-bounds Read
▤

Affected Products & Versions

2
busybox<= 1.30.0
canonical ubuntu linuxall versions
⚠

Public Exploits & PoCs

2
pocpacketstormsecurity.com · Cisco-Device-Hardcoded-Credentials-GNU-glibc-BusyBox.htmlpacketstormsecurity.com
pocbugs.busybox.net · show_bug.cgi?id=11506bugs.busybox.net
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Jan 2019 · 04:29 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

7
suse-csafopenSUSE-SU-2024:11738-1
suse-csafSUSE-SU-2022:4253-1
suse-csafSUSE-SU-2022:3959-1
suse-csafSUSE-SU-2022:0135-2
suse-csafopenSUSE-SU-2022:0135-1
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://seclists.org/fulldisclosure/2019/Sep/7Mailing ListThird Party Advisory
https://git.busybox.net/busybox/commit/?id=74d9f1ba37010face4bd1449df4d60dd84450b06PatchThird Party Advisory
https://seclists.org/bugtraq/2019/Sep/7Mailing ListThird Party Advisory
https://usn.ubuntu.com/3935-1/Third Party Advisory
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