CVE-2018-11574: Input Validation
First published: Thu Jun 14 2018(Updated: )
Improper input validation together with an integer overflow in the EAP-TLS protocol implementation in PPPD may cause a crash, information disclosure, or authentication bypass. This implementation is distributed as a patch for PPPD 0.91, and includes the affected eap.c and eap-tls.c files. Configurations that use the `refuse-app` option are unaffected.
Credit: cve@mitre.org cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| ubuntu/ppp | <2.4.7-2+2ubuntu1.1 | 2.4.7-2+2ubuntu1.1 |
| ubuntu/ppp | <2.4.7-2+3ubuntu1 | 2.4.7-2+3ubuntu1 |
| ubuntu/ppp | <2.4.5-5.1ubuntu2.3 | 2.4.5-5.1ubuntu2.3 |
| ubuntu/ppp | <2.4.7-2+3 | 2.4.7-2+3 |
| ubuntu/ppp | <2.4.7-1+2ubuntu1.16.04.1 | 2.4.7-1+2ubuntu1.16.04.1 |
| Point-to-point Protocol Project Point-to-point Protocol | <2.4.9 | |
| Canonical Ubuntu Linux | =14.04 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| <2.4.9 | ||
| =14.04 | ||
| =16.04 | ||
| =18.04 | ||
| debian/ppp | 2.4.7-2+4.1+deb10u1 2.4.9-1+1 2.4.9-1+1.1 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2018/06/11/1
- https://usn.ubuntu.com/3810-1/
- https://launchpad.net/bugs/cve/CVE-2018-11574
- https://www.openwall.com/lists/oss-security/2018/06/11/1
- https://www.nikhef.nl/~janjust/ppp/ppp-2.4.7-eaptls-mppe-1.101.patch
- https://security-tracker.debian.org/tracker/CVE-2018-11574
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-11574
- https://ubuntu.com/security/notices/USN-3810-1
- https://nvd.nist.gov/vuln/detail/CVE-2018-11574
- https://ubuntu.com/security/CVE-2018-11574
Frequently Asked Questions
What is CVE-2018-11574?
CVE-2018-11574 is a vulnerability that involves improper input validation and an integer overflow in the EAP-TLS protocol implementation in PPPD.
What is the severity of CVE-2018-11574?
The severity of CVE-2018-11574 is critical with a CVSS score of 9.8.
How does CVE-2018-11574 impact affected software?
CVE-2018-11574 may cause a crash, information disclosure, or authentication bypass on affected systems.
Which software versions are affected by CVE-2018-11574?
PPPD versions up to and including 2.4.9, Canonical Ubuntu Linux 14.04, 16.04, and 18.04, and certain versions of the ppp package in Debian and Ubuntu are affected by CVE-2018-11574.
How can I fix CVE-2018-11574?
To fix CVE-2018-11574, upgrade to a patched version of PPPD (version 2.4.9 or higher) or update the ppp package to the recommended versions provided by the respective vendors.
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