CVE-2018-9918
First published: Tue Apr 10 2018(Updated: )
libqpdf.a in QPDF through 8.0.2 mishandles certain "expected dictionary key but found non-name object" cases, allowing remote attackers to cause a denial of service (stack exhaustion), related to the QPDFObjectHandle and QPDF_Dictionary classes, because nesting in direct objects is not restricted.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| ubuntu/qpdf | <8.0.2-3~17.10.1 | 8.0.2-3~17.10.1 |
| ubuntu/qpdf | <8.0.2-3~14.04.1 | 8.0.2-3~14.04.1 |
| ubuntu/qpdf | <8.0.2-3~16.04.1 | 8.0.2-3~16.04.1 |
| debian/qpdf | 10.1.0-1 11.3.0-1+deb12u1 11.9.1-1 | |
| qpdf | <=8.0.2 | |
| Ubuntu | =14.04 | |
| Ubuntu | =16.04 | |
| Ubuntu | =17.10 |
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Reference Links
- https://github.com/qpdf/qpdf/commit/b4d6cf6836ce025ba1811b7bbec52680c7204223
- https://github.com/qpdf/qpdf/issues/202
- https://usn.ubuntu.com/3638-1/
- https://launchpad.net/bugs/cve/CVE-2018-9918
- https://security-tracker.debian.org/tracker/CVE-2018-9918
- https://ubuntu.com/security/notices/USN-3638-1
- https://www.cve.org/CVERecord?id=CVE-2018-9918
- https://nvd.nist.gov/vuln/detail/CVE-2018-9918
- https://ubuntu.com/security/CVE-2018-9918
Frequently Asked Questions
What is the severity of CVE-2018-9918?
CVE-2018-9918 has been classified as a denial of service vulnerability due to stack exhaustion.
How do I fix CVE-2018-9918?
To fix CVE-2018-9918, upgrade to version 10.1.0-1 or later for Debian or ensure you're using qpdf versions 8.0.2-3~14.04.1 or later for Ubuntu.
What software is affected by CVE-2018-9918?
CVE-2018-9918 affects qpdf versions up to and including 8.0.2 on various Ubuntu and Debian distributions.
Can CVE-2018-9918 be exploited remotely?
Yes, CVE-2018-9918 can be exploited by remote attackers to cause a denial of service.
What kind of issue does CVE-2018-9918 cause?
CVE-2018-9918 causes stack exhaustion leading to denial of service.
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