CVE-2017-9233
HIGHCVSS 7.5/10EPSS 8.74%
Last modified
CVE-2017-9233 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. XML External Entity vulnerability in libexpat 2.2.0 and earlier (Expat XML Parser Library) allows attackers to put the parser in an infinite loop using a malformed external entity definition from an external DTD.. EPSS estimates a 8.74% chance of exploitation in the next 30 days.
Description
XML External Entity vulnerability in libexpat 2.2.0 and earlier (Expat XML Parser Library) allows attackers to put the parser in an infinite loop using a malformed external entity definition from an external DTD.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Libexpat Project | Libexpat | <= 2.2.0 |
| Python | Python | >= 2.7.0, < 2.7.15 |
| Python | Python | >= 3.3.0, < 3.3.7 |
| Python | Python | >= 3.4.0, < 3.4.7 |
| Python | Python | >= 3.5.0, < 3.5.4 |
| Python | Python | >= 3.6.0, < 3.6.2 |
| Debian | Debian Linux | 8.0 |
| Debian | Debian Linux | 9.0 |
| Debian | Debian Linux | 10.0 |
References
- http://www.debian.org/security/2017/dsa-3898Third Party Advisory
- http://www.openwall.com/lists/oss-security/2017/06/17/7Mailing List, VDB Entry
- http://www.securityfocus.com/bid/99276Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039427Third Party Advisory, VDB Entry
- https://github.com/libexpat/libexpat/blob/master/expat/ChangesRelease Notes, Third Party Advisory
- https://libexpat.github.io/doc/cve-2017-9233/Exploit, Technical Description, Vendor Advisory
- https://support.apple.com/HT208112Third Party Advisory
- https://support.apple.com/HT208113Third Party Advisory
- https://support.apple.com/HT208115Third Party Advisory
- https://support.apple.com/HT208144Third Party Advisory
- https://support.f5.com/csp/article/K03244804Third Party Advisory
- http://www.debian.org/security/2017/dsa-3898Third Party Advisory
- http://www.openwall.com/lists/oss-security/2017/06/17/7Mailing List, VDB Entry
- http://www.securityfocus.com/bid/99276Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039427Third Party Advisory, VDB Entry
- https://github.com/libexpat/libexpat/blob/master/expat/ChangesRelease Notes, Third Party Advisory
- https://libexpat.github.io/doc/cve-2017-9233/Exploit, Technical Description, Vendor Advisory
- https://support.apple.com/HT208112Third Party Advisory
- https://support.apple.com/HT208113Third Party Advisory
- https://support.apple.com/HT208115Third Party Advisory
- https://support.apple.com/HT208144Third Party Advisory
- https://support.f5.com/csp/article/K03244804Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2017-9233?
XML External Entity vulnerability in libexpat 2.2.0 and earlier (Expat XML Parser Library) allows attackers to put the parser in an infinite loop using a malformed external entity definition from an external DTD.
How severe is CVE-2017-9233?
CVE-2017-9233 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 8.74% probability of exploitation in the next 30 days.
How do I fix CVE-2017-9233?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2017-9233?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST