CVE-2018-20679

An issue was discovered in BusyBox before 1.30.0. An out of bounds read in udhcp components (consumed by the DHCP server, client, and relay) allows a remote attacker to leak sensitive information from the stack by sending a crafted DHCP message. This is related to verification in udhcp_get_option() in networking/udhcp/common.c that 4-byte options are indeed 4 bytes.

CVSS v3.0 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3.0 : HIGH

Vector : AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://git.busybox.net/busybox/commit/?id=6d3b4bb24da9a07c263f3c1acf8df85382ff562c	Patch Third Party Advisory
https://busybox.net/news.html	Release Notes Third Party Advisory
https://bugs.busybox.net/show_bug.cgi?id=11506	Issue Tracking Exploit Third Party Advisory
https://usn.ubuntu.com/3935-1/	Third Party Advisory
http://seclists.org/fulldisclosure/2019/Sep/7
https://seclists.org/bugtraq/2019/Sep/7
http://packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-GNU-glibc-BusyBox.html

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Configurations

Configuration 1 (hide)

cpe:2.3:a:busybox:busybox:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:18.10:::::::*

Information

Published : 2019-01-09 08:29

Updated : 2019-09-04 16:15

NVD link : CVE-2018-20679

Mitre link : CVE-2018-20679

JSON object : View

CWE

CWE-125

Out-of-bounds Read

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Products Affected

canonical

ubuntu_linux

busybox

busybox

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