CVE-2019-5747
First published: Wed Jan 09 2019(Updated: )
An issue was discovered in BusyBox through 1.30.0. An out of bounds read in udhcp components (consumed by the DHCP client, server, and/or relay) might allow a remote attacker to leak sensitive information from the stack by sending a crafted DHCP message. This is related to assurance of a 4-byte length when decoding DHCP_SUBNET. NOTE: this issue exists because of an incomplete fix for CVE-2018-20679.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Busybox Busybox | <=1.30.0 | |
| Canonical Ubuntu Linux | =14.04 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Canonical Ubuntu Linux | =18.10 | |
| debian/busybox | 1:1.30.1-6 1:1.35.0-4 1:1.37.0-4 |
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Reference Links
- http://packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-GNU-glibc-BusyBox.html
- http://seclists.org/fulldisclosure/2019/Sep/7
- https://bugs.busybox.net/show_bug.cgi?id=11506
- https://git.busybox.net/busybox/commit/?id=74d9f1ba37010face4bd1449df4d60dd84450b06
- https://seclists.org/bugtraq/2019/Sep/7
- https://usn.ubuntu.com/3935-1/
- https://launchpad.net/bugs/cve/CVE-2019-5747
- https://security-tracker.debian.org/tracker/CVE-2019-5747
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-5747
- https://nvd.nist.gov/vuln/detail/CVE-2019-5747
- https://ubuntu.com/security/CVE-2019-5747
Frequently Asked Questions
What is CVE-2019-5747?
CVE-2019-5747 is a vulnerability in BusyBox through 1.30.0 that allows a remote attacker to leak sensitive information from the stack by sending a crafted DHCP message.
How severe is CVE-2019-5747?
CVE-2019-5747 has a severity rating of 7.5 (High).
How can I fix CVE-2019-5747?
To fix CVE-2019-5747, update to BusyBox version 1.27.2-2ubuntu5 or later.
Where can I find more information about CVE-2019-5747?
You can find more information about CVE-2019-5747 at the following references: <ul><li><a href='https://bugs.busybox.net/show_bug.cgi?id=11506' target='_blank'>https://bugs.busybox.net/show_bug.cgi?id=11506</a></li><li><a href='https://git.busybox.net/busybox/commit/?id=74d9f1ba37010face4bd1449df4d60dd84450b06' target='_blank'>https://git.busybox.net/busybox/commit/?id=74d9f1ba37010face4bd1449df4d60dd84450b06</a></li><li><a href='https://usn.ubuntu.com/3935-1/' target='_blank'>https://usn.ubuntu.com/3935-1/</a></li></ul>
What is the Common Weakness Enumeration (CWE) associated with CVE-2019-5747?
The Common Weakness Enumeration (CWE) associated with CVE-2019-5747 is CWE-125 (Out-of-bounds Read).
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