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TI-2021-02463 Aliases CVE-2021-3504GHSA-5vp3-c6x6-5464

Out-of-bounds read in hivex

Priority LOW 28CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · None · Low
Fix status
Partial Red Hat: 8 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

A flaw was found in the hivex library in versions before 1.3.20. It is caused due to a lack of bounds check within the hivex_open function. An attacker could input a specially crafted Windows Registry (hive) file which would cause hivex to read memory beyond its normal bounds or cause the program to crash. The highest threat from this vulnerability is to system availability.

Why it matters now

EPSS 0.01849 79th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 8 fixed, 2 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—hivexhivex-1.3.20—No fix listedCNA
  • hivex Vendor— Affected hivex-1.3.20 Fixed in — No fix listed CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:a:redhat:hivex:*:*:*:*:*:*:*:*before 1.3.20VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*8.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*8.0VulnerableRed Hat
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*34VulnerableFedoraproject
  • cpe:2.3:a:redhat:hivex:*:*:*:*:*:*:*:* Versions before 1.3.20 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:* Versions 8.0 Vulnerable ·Red Hat
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject

Remediation

Red Hat 2 advisories

  • RHSA-2021:3061 Released 2021-08-10 · Red Hat rating Moderate
    virt:rhel and virt-devel:rhel security and bug fix update
    • Red Hat CodeReady Linux Builder (v. 8) SLOF-20191022-3.git899d9883.module+el8.3.0+6423+e4cb6418.src::virt-devel:rhel, hivex-1.3.18-21.module+el8.4.0+10770+19c037f9.i686::virt-devel:rhel, hivex-devel-1.3.18-21.module+el8.4.0+10770+19c037f9.i686::virt-devel:rhel +47
    • Red Hat Enterprise Linux AppStream (v. 8) SLOF-20191022-3.git899d9883.module+el8.3.0+6423+e4cb6418.noarch::virt:rhel, SLOF-20191022-3.git899d9883.module+el8.3.0+6423+e4cb6418.src::virt:rhel, hivex-1.3.18-21.module+el8.4.0+10770+19c037f9.aarch64::virt:rhel +47
  • RHSA-2021:2318 Released 2021-06-08 · Red Hat rating Moderate
    hivex security update
    • Red Hat Enterprise Linux Client (v. 7) hivex-1.3.10-6.11.el7_9, perl-hivex-1.3.10-6.11.el7_9
    • Red Hat Enterprise Linux Client Optional (v. 7) hivex-devel-1.3.10-6.11.el7_9, ocaml-hivex-1.3.10-6.11.el7_9, ocaml-hivex-devel-1.3.10-6.11.el7_9 +2
    • Red Hat Enterprise Linux Server (v. 7) hivex-1.3.10-6.11.el7_9, perl-hivex-1.3.10-6.11.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) hivex-devel-1.3.10-6.11.el7_9, ocaml-hivex-1.3.10-6.11.el7_9, ocaml-hivex-devel-1.3.10-6.11.el7_9 +2
    • Red Hat Enterprise Linux Workstation (v. 7) hivex-1.3.10-6.11.el7_9, perl-hivex-1.3.10-6.11.el7_9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) hivex-devel-1.3.10-6.11.el7_9, ocaml-hivex-1.3.10-6.11.el7_9, ocaml-hivex-devel-1.3.10-6.11.el7_9 +2

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 8 Advanced VirtualizationAffectedNo fix yet
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2021:3061
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2021:3061
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2021:2318
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2021:2318
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2021:2318
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2021:2318
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2021:2318
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2021:2318
Not affected: 1 product
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-3504
  2. 2026-10-03 Alias added: GHSA-5vp3-c6x6-5464

References

Patch 1

Advisory 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences