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TI-2021-03613 Aliases CVE-2021-20325GHSA-4pm7-9gg5-72pv

Memory corruption in httpd

Priority MEDIUM 45CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.

Summary

Missing fixes for CVE-2021-40438 and CVE-2021-26691 in the versions of httpd, as shipped in Red Hat Enterprise Linux 8.5.0, causes a security regression compared to the versions shipped in Red Hat Enterprise Linux 8.4. A user who installs or updates to Red Hat Enterprise Linux 8.5.0 would be vulnerable to the mentioned CVEs, even if they were properly fixed in Red Hat Enterprise Linux 8.4. CVE-2021-20325 was assigned to that Red Hat specific security regression and it does not affect the upstream versions of httpd.

Why it matters now

EPSS 0.01593 75th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
—httpdhttpd 2.4.47, httpd 2.4.49—No fix listedCNA
  • httpd Vendor— Affected httpd 2.4.47, httpd 2.4.49 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:redhat:enterprise_linux:8.5.0:*:*:*:*:*:*:*8.5.0VulnerableRed Hat
  • cpe:2.3:o:redhat:enterprise_linux:8.5.0:*:*:*:*:*:*:* Versions 8.5.0 Vulnerable ·Red Hat

Remediation

Red Hat 1 advisory

  • RHSA-2021:4537 Released 2021-11-09 · Red Hat rating Important
    httpd:2.4 security update
    • Red Hat Enterprise Linux AppStream (v. 8) httpd-2.4.37-43.module+el8.5.0+13064+c4b14997.aarch64::httpd:2.4, httpd-2.4.37-43.module+el8.5.0+13064+c4b14997.ppc64le::httpd:2.4, httpd-2.4.37-43.module+el8.5.0+13064+c4b14997.s390x::httpd:2.4 +38

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2021:4537
Not affected: 5 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 9
  • Red Hat JBoss Core Services
  • Red Hat Software Collections

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-20325
  2. 2026-10-03 Alias added: GHSA-4pm7-9gg5-72pv

References

Advisory 1

  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-10530 Code injection in [UNKNOWN] RichFaces KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-23530 Sudo before 1.9.17p1 allows local users to obtain root access because /etc/nsswitch.conf… KEVCVSS 3.1CRITICAL 9.3
  • TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
See all 1955 →

Sources

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