CVE-2021-3537
Nokogiri Implements libxml2 version vulnerable to null pointer dereferencing
5.9
MEDIUM
CVSS 3.1
EPSS 0.11%
Description
A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery mode and post-validated, the flaw could be used to crash the application. The highest threat from this vulnerability is to system availability.
How to fix CVE-2021-3537
To remediate CVE-2021-3537, upgrade the affected package to a fixed version below.
- —upgrade to 2.9.9-r5 or later
- —upgrade to 2.9.10+dfsg-6.6 or later
- —upgrade to 1.11.4 or later
Is CVE-2021-3537 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 2.9.9-r5
- from 0, < 2.9.10+dfsg-6.6
- from 0, < 1.11.4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |