CVE-2020-10933
MEDIUM5.3EPSS 0.41%Published: 5/4/2020Modified: 12/3/2025
Also known as:ALPINE-CVE-2020-10933DEBIAN-CVE-2020-10933
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.
Affected packages (4)
- Alpine/rubyfrom 0, < 2.5.8-r0
- Bitnami/ruby>= 2.5.0, < 2.5.8, >= 2.6.0, < 2.6.6, >= 2.7.0, < 2.7.1
- Bitnami/ruby-min>= 2.5.0, < 2.5.8, >= 2.6.0, < 2.6.6, >= 2.7.0, < 2.7.1
- Debian/ruby2.7from 0, < 2.7.1-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
References (7)
- ADVISORYhttps://security.alpinelinux.org/vuln/CVE-2020-10933
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2020-10933
- WEBhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F4TNVTT66VPRMX5UZYSDGSVRXKKDDDU5/
- WEBhttps://nvd.nist.gov/vuln/detail/CVE-2020-10933
- WEBhttps://security.netapp.com/advisory/ntap-20200625-0001/
- WEBhttps://www.debian.org/security/2020/dsa-4721
- WEBhttps://www.ruby-lang.org/en/news/2020/03/31/heap-exposure-in-socket-cve-2020-10933/