Vulnerability Monitor

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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 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.

Published

2019-01-09T16:29:00.353

Last Modified

2025-06-09T16:15:31.280

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:N/A:N

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-125
Type: Secondary
CWE-125

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	busybox	busybox	≤ 1.30.0	Yes
Operating System	canonical	ubuntu_linux	14.04	Yes
Operating System	canonical	ubuntu_linux	16.04	Yes
Operating System	canonical	ubuntu_linux	18.04	Yes
Operating System	canonical	ubuntu_linux	18.10	Yes

References

http://packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-GNU-glibc-BusyBox.html Exploit, Third Party Advisory, VDB Entry ([email protected])
http://seclists.org/fulldisclosure/2019/Sep/7 Mailing List, Third Party Advisory ([email protected])
https://bugs.busybox.net/show_bug.cgi?id=11506 Exploit, Issue Tracking, Third Party Advisory ([email protected])
https://git.busybox.net/busybox/commit/?id=74d9f1ba37010face4bd1449df4d60dd84450b06 Patch, Third Party Advisory ([email protected])
https://seclists.org/bugtraq/2019/Sep/7 Mailing List, Third Party Advisory ([email protected])
https://usn.ubuntu.com/3935-1/ Third Party Advisory ([email protected])
http://packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-GNU-glibc-BusyBox.html Exploit, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2019/Sep/7 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugs.busybox.net/show_bug.cgi?id=11506 Exploit, Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://git.busybox.net/busybox/commit/?id=74d9f1ba37010face4bd1449df4d60dd84450b06 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://seclists.org/bugtraq/2019/Sep/7 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/3935-1/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)