CVE-2018-20679
Published: 9 January 2019
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.
Notes
Author | Note |
---|---|
mdeslaur | this fix is incomplete, see CVE-2019-5747 |
Priority
Status
Package | Release | Status |
---|---|---|
busybox Launchpad, Ubuntu, Debian |
hirsute |
Released
(1:1.27.2-2ubuntu5)
|
bionic |
Released
(1:1.27.2-2ubuntu3.2)
|
|
cosmic |
Released
(1:1.27.2-2ubuntu4.1)
|
|
disco |
Released
(1:1.27.2-2ubuntu5)
|
|
eoan |
Released
(1:1.27.2-2ubuntu5)
|
|
focal |
Released
(1:1.27.2-2ubuntu5)
|
|
groovy |
Released
(1:1.27.2-2ubuntu5)
|
|
trusty |
Released
(1:1.21.0-1ubuntu1.4)
|
|
upstream |
Released
(1:1.30.1-2)
|
|
xenial |
Released
(1:1.22.0-15ubuntu1.4)
|
|
Patches: upstream: https://git.busybox.net/busybox/commit/?id=6d3b4bb24da9a07c263f3c1acf8df85382ff562c |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |