CVE-2021-3541 (GCVE-0-2021-3541)

Vulnerability from cvelistv5 – Published: 2021-07-09 16:02 – Updated: 2024-08-03 17:01
VLAI
Summary
A flaw was found in libxml2. Exponential entity expansion attack its possible bypassing all existing protection mechanisms and leading to denial of service.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • Denial of Service
Assigner
References
Impacted products
Vendor Product Version
n/a libxml2 Affected: 2.9.11
Show details on NVD website
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T07:47:21+00:00",
      "cve": "CVE-2021-3541",
      "id": "CVE-2021-3541",
      "initial_release_date": "2021-05-13T00:00:00+00:00",
      "product_status:fixed": "193",
      "product_status:known_affected": "12",
      "product_status:known_not_affected": "4",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "libxml2: Exponential entity expansion attack bypasses all existing protection mechanisms",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-3541.json",
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.