Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Busybox | Busybox | < 1.30.0 |
| Canonical | Ubuntu Linux | 14.04 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-G
- http://seclists.org/fulldisclosure/2019/Sep/7
- https://bugs.busybox.net/show_bug.cgi?id=11506ExploitIssue TrackingThird Party Advisory
- https://busybox.net/news.htmlRelease NotesThird Party Advisory
- https://git.busybox.net/busybox/commit/?id=6d3b4bb24da9a07c263f3c1acf8df85382ff5PatchThird Party Advisory
- https://seclists.org/bugtraq/2019/Sep/7
- https://usn.ubuntu.com/3935-1/Third Party Advisory
- http://packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-G
- http://seclists.org/fulldisclosure/2019/Sep/7
- https://bugs.busybox.net/show_bug.cgi?id=11506ExploitIssue TrackingThird Party Advisory
- https://busybox.net/news.htmlRelease NotesThird Party Advisory
- https://git.busybox.net/busybox/commit/?id=6d3b4bb24da9a07c263f3c1acf8df85382ff5PatchThird Party Advisory
- https://seclists.org/bugtraq/2019/Sep/7
- https://usn.ubuntu.com/3935-1/Third Party Advisory
FAQ
What is CVE-2018-20679?
CVE-2018-20679 is a vulnerability with a CVSS score of 7.5 (HIGH). 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...
How severe is CVE-2018-20679?
CVE-2018-20679 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-20679?
Check the references section above for vendor advisories and patch information. Affected products include: Busybox Busybox, Canonical Ubuntu Linux.