Vulnerability in Linux Kernel
CVE-2020-10933
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.026 (84.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: +0.001
Affected products
- Linux Kernel
- Ruby-Lang Ruby — versions 2.7.0
- Debian Linux — versions 10.0
- Fedoraproject Fedora — versions 31
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.ruby-lang.org/en/news/2020/03/31/heap-exposure-in-socket-cve-2020-10933/ (Exploit, Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.netapp.com/advisory/ntap-20200625-0001/ (Third Party Advisory)
- www.debian.org/security/2020/dsa-4721 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-10933?
- CVE-2020-10933 is a medium-severity vulnerability in Linux Kernel, classified under Use of Uninitialized Resource. CVSS score: 5.3/10. Published 2020-05-04.
- How severe is CVE-2020-10933?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2020-10933 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.