CVE & CISA-KEV Catalog

CVE-2020-10933

MEDIUMEPSS 83th pctl
5.3
CVSS v3
NVD

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.

CWE-908

How to fix

Remediation Available
ruby2.7Debian
Fixed in:2.7.1-1CVE-2020-10933
libruby2.3Ubuntu
Fixed in:2.3.1-2~ubuntu16.04.15USN-4882-1
libruby2.5Ubuntu
Fixed in:2.5.1-1ubuntu1.8USN-4882-1
libruby2.7Ubuntu
Fixed in:2.7.0-5ubuntu1.3USN-4882-1
ruby2.3Ubuntu
Fixed in:2.3.1-2~ubuntu16.04.15USN-4882-1
ruby2.5Ubuntu
Fixed in:2.5.1-1ubuntu1.8USN-4882-1
ruby2.7Ubuntu
Fixed in:2.7.0-5ubuntu1.3USN-4882-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityLow
IntegrityNone
AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploit Intelligence

2.56%probability of exploitation in 30 days
83rdpercentile

Elevated risk: more likely to be exploited than 83% of all known CVEs.

References

Third-Party Advisory2
Other references1
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.