NULL Pointer Dereference

Affecting libxml2 package, versions <2.9.4+dfsg1-2.2+deb9u4

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NVD Description

Note: Versions mentioned in the description apply to the upstream libxml2 package. See Remediation section below for Debian:9 relevant versions.

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.

Remediation

Upgrade Debian:9 libxml2 to version 2.9.4+dfsg1-2.2+deb9u4 or higher.

References

CVSS Score

5.9
medium severity
  • Attack Vector
    Network
  • Attack Complexity
    High
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    None
  • Integrity
    None
  • Availability
    High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVE
CVE-2021-3537
CWE
CWE-476
Snyk ID
SNYK-DEBIAN9-LIBXML2-1290156
Disclosed
14 May, 2021
Published
06 May, 2021