Vulnerability Description
An issue was discovered in Ruby 2.5.x through 2.5.7, 2.6.x through 2.6.5, and 2.7.0. If a victim calls BasicSocket#read_nonblock(requested_size, buffer, exception: false), the method resizes the buffer to fit the requested size, but no data is copied. Thus, the buffer string provides the previous value of the heap. This may expose possibly sensitive data from the interpreter.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ruby-Lang | Ruby | >= 2.5.0, <= 2.5.7 |
| Linux | Linux Kernel | - |
| Fedoraproject | Fedora | 31 |
| Debian | Debian Linux | 10.0 |
Related Weaknesses (CWE)
References
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.netapp.com/advisory/ntap-20200625-0001/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4721Third Party Advisory
- https://www.ruby-lang.org/en/news/2020/03/31/heap-exposure-in-socket-cve-2020-10ExploitVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.netapp.com/advisory/ntap-20200625-0001/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4721Third Party Advisory
- https://www.ruby-lang.org/en/news/2020/03/31/heap-exposure-in-socket-cve-2020-10ExploitVendor Advisory
FAQ
What is CVE-2020-10933?
CVE-2020-10933 is a vulnerability with a CVSS score of 5.3 (MEDIUM). An issue was discovered in Ruby 2.5.x through 2.5.7, 2.6.x through 2.6.5, and 2.7.0. If a victim calls BasicSocket#read_nonblock(requested_size, buffer, exception: false), the method resizes the buffe...
How severe is CVE-2020-10933?
CVE-2020-10933 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-10933?
Check the references section above for vendor advisories and patch information. Affected products include: Ruby-Lang Ruby, Linux Linux Kernel, Fedoraproject Fedora, Debian Debian Linux.