CVE-2020-10933
Published: 4 May 2020
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.
Notes
| Author | Note |
|---|---|
| leosilva | vulnerable code introduced in 2.5.0 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
ruby1.9.1 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
|
ruby2.0 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
|
ruby2.3 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Not vulnerable
(code not present)
|
|
|
ruby2.5 Launchpad, Ubuntu, Debian |
bionic |
Released
(2.5.1-1ubuntu1.8)
|
| eoan |
Ignored
(end of life)
|
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
|
ruby2.7 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| eoan |
Does not exist
|
|
| focal |
Released
(2.7.0-5ubuntu1.3)
|
|
| groovy |
Not vulnerable
(2.7.1-3ubuntu1.1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(2.7.1-1)
|
|
| xenial |
Does not exist
|
|
|
Patches: upstream: https://github.com/ruby/ruby/commit/61b7f86248bd121be2e83768be71ef289e8e5b90 upstream: https://github.com/ruby/ruby/commit/f832d957b837d5167058a3f8579d66e5b5d3472e |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.3 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |