CVE-2018-20679
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductBusybox
PublishedJan 9, 2019
First seenJan 9, 2019
Weakness typeCWE-125Out-of-bounds read
How to fix
Update
- busybox busybox1.30.0 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| busybox busybox | v < 1.30.0 | 1.30.0 |
| canonical ubuntu_linux | 14.04, 16.04, 18.04, 18.10 | — |
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