busybox: An issue was discovered in BusyBox before 1.30.0
CVE-2018-20679 is fixed in 6 products on 1 platform, first by busybox 1:1.27.2-2ubuntu3.2, released January 8, 2019. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| busybox · Ubuntu 18.04.6 LTS (bionic) | 1:1.27.2-2ubuntu3.2 | busybox 1:1.27.2-2ubuntu3.2 | Jan 8, 2019 |
| busybox-initramfs · Ubuntu 18.04.6 LTS (bionic) | 1:1.27.2-2ubuntu3.2 | busybox-initramfs 1:1.27.2-2ubuntu3.2 | Jan 8, 2019 |
| busybox-static · Ubuntu 18.04.6 LTS (bionic) | 1:1.27.2-2ubuntu3.2 | busybox-static 1:1.27.2-2ubuntu3.2 | Jan 8, 2019 |
| busybox-syslogd · Ubuntu 18.04.6 LTS (bionic) | 1:1.27.2-2ubuntu3.2 | busybox-syslogd 1:1.27.2-2ubuntu3.2 | Jan 8, 2019 |
| udhcpc · Ubuntu 18.04.6 LTS (bionic) | 1:1.27.2-2ubuntu3.2 | udhcpc 1:1.27.2-2ubuntu3.2 | Jan 8, 2019 |
| udhcpd · Ubuntu 18.04.6 LTS (bionic) | 1:1.27.2-2ubuntu3.2 | udhcpd 1:1.27.2-2ubuntu3.2 | Jan 8, 2019 |
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