Medium severity5.3NVD Advisory· Published May 4, 2020· Updated Jun 17, 2026
CVE-2020-10933
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.
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Affected products
27- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
- Ruby/Rubydescription
- osv-coords21 versionspkg:bitnami/rubypkg:bitnami/ruby-minpkg:rpm/almalinux/rubygem-abrtpkg:rpm/almalinux/rubygem-abrt-docpkg:rpm/almalinux/rubygem-bsonpkg:rpm/almalinux/rubygem-bson-docpkg:rpm/almalinux/rubygem-mongopkg:rpm/almalinux/rubygem-mongo-docpkg:rpm/almalinux/rubygem-mysql2pkg:rpm/almalinux/rubygem-mysql2-docpkg:rpm/almalinux/rubygem-pgpkg:rpm/almalinux/rubygem-pg-docpkg:rpm/opensuse/ruby2.5&distro=openSUSE%20Leap%2015.1pkg:rpm/opensuse/ruby2.7&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/ruby3.0&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/ruby3.1&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/ruby3.2&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/ruby3.3&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/ruby3.4&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/ruby4.0&distro=openSUSE%20Tumbleweedpkg:rpm/suse/ruby2.5&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP1
>= 2.5.0, < 2.5.8+ 20 more
- (no CPE)range: >= 2.5.0, < 2.5.8
- (no CPE)range: >= 2.5.0, < 2.5.8
- (no CPE)range: < 0.3.0-4.module_el8.5.0+2625+ec418553
- (no CPE)range: < 0.3.0-4.module_el8.5.0+259+8cec6917
- (no CPE)range: < 4.3.0-2.module_el8.5.0+2625+ec418553
- (no CPE)range: < 4.3.0-2.module_el8.5.0+2625+ec418553
- (no CPE)range: < 2.5.1-2.module_el8.5.0+259+8cec6917
- (no CPE)range: < 2.5.1-2.module_el8.5.0+2625+ec418553
- (no CPE)range: < 0.4.10-4.module_el8.5.0+259+8cec6917
- (no CPE)range: < 0.4.10-4.module_el8.5.0+2625+ec418553
- (no CPE)range: < 1.0.0-2.module_el8.5.0+2625+ec418553
- (no CPE)range: < 1.0.0-2.module_el8.5.0+2625+ec418553
- (no CPE)range: < 2.5.8-lp151.4.9.1
- (no CPE)range: < 2.7.3-3.2
- (no CPE)range: < 3.0.1-3.2
- (no CPE)range: < 3.1.0-1.1
- (no CPE)range: < 3.2.1-1.1
- (no CPE)range: < 3.3.0-1.2
- (no CPE)range: < 3.4.1-1.1
- (no CPE)range: < 4.0.0~preview2-1.1
- (no CPE)range: < 2.5.8-4.11.1
Patches
Vulnerability mechanics
References
4- www.ruby-lang.org/en/news/2020/03/31/heap-exposure-in-socket-cve-2020-10933/nvdExploitVendor Advisory
- security.netapp.com/advisory/ntap-20200625-0001/nvdThird Party Advisory
- www.debian.org/security/2020/dsa-4721nvdThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F4TNVTT66VPRMX5UZYSDGSVRXKKDDDU5/nvd
News mentions
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