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TI-2006-06995 Aliases CVE-2006-20001GHSA-p5j8-2qpf-wxr5

Apache HTTP Server: mod_dav out of bounds read, or write of zero byte

Priority LOW 39CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 5 fixed, 4 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

A carefully crafted If: request header can cause a memory read, or write of a single zero byte, in a pool (heap) memory location beyond the header value sent. This could cause the process to crash. This issue affects Apache HTTP Server 2.4.54 and earlier.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.03583 89th percentileScored 2026-11-07
Fix Partial Red Hat: 4 advisoriesRed Hat: 5 fixed, 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache HTTP Server2.4 – 2.4.54—No fix listedCNA
  • Apache HTTP Server VendorApache Affected 2.4 – 2.4.54 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*before 2.4.55VulnerableApache
  • cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* Versions before 2.4.55 Vulnerable ·Apache

Remediation

Red Hat 4 advisories

  • RHSA-2023:3354 Released 2023-06-05 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.51 SP2 security update
    • Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-apr-util-1.6.1-101.el7jbcs, jbcs-httpd24-apr-util-devel-1.6.1-101.el7jbcs, jbcs-httpd24-apr-util-ldap-1.6.1-101.el7jbcs +23
    • Red Hat JBoss Core Services on RHEL 8 jbcs-httpd24-apr-util-1.6.1-101.el8jbcs, jbcs-httpd24-apr-util-devel-1.6.1-101.el8jbcs, jbcs-httpd24-apr-util-ldap-1.6.1-101.el8jbcs +23
  • RHSA-2023:3355 Released 2023-06-05 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.51 SP2 security update
    • JBCS httpd 2.4.51.sp2
  • RHSA-2023:0970 Released 2023-02-28 · Red Hat rating Moderate
    httpd security and bug fix update
    • Red Hat Enterprise Linux AppStream (v. 9) httpd-2.4.53-7.el9_1.1, httpd-core-2.4.53-7.el9_1.1, httpd-devel-2.4.53-7.el9_1.1 +8
Show 1 more Red Hat advisories
  • RHSA-2023:0852 Released 2023-02-21 · Red Hat rating Moderate
    httpd:2.4 security and bug fix update
    • Red Hat Enterprise Linux AppStream (v. 8) httpd-2.4.37-51.module+el8.7.0+18026+7b169787.1.aarch64::httpd:2.4, httpd-2.4.37-51.module+el8.7.0+18026+7b169787.1.ppc64le::httpd:2.4, httpd-2.4.37-51.module+el8.7.0+18026+7b169787.1.s390x::httpd:2.4 +38

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 7AffectedNo fix planned: Out of support scope
Red Hat JBoss Enterprise Application Platform 6AffectedNo fix planned: Out of support scope
Red Hat Software CollectionsAffectedNo fix planned: Will not fix
JBCS httpd 2.4.51.sp2Fixed RHSA-2023:3355
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2023:0852
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:0970
Red Hat JBoss Core Services on RHEL 7 ServerFixed RHSA-2023:3354
Red Hat JBoss Core Services on RHEL 8Fixed RHSA-2023:3354
Not affected: 2 products
  • Red Hat JBoss Core Services on RHEL 7 Server
  • Red Hat JBoss Core Services on RHEL 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2006-20001
  2. 2026-10-03 Alias added: GHSA-p5j8-2qpf-wxr5
  3. 2026-10-09 Fix available: RHSA-2023:3355 · Red Hat
  4. 2026-11-05 Fix available: JBCS httpd 2.4.51.sp2 · Red Hat

References

Advisory 1

Other 1

  • TI-2021-18535 Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773) KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-18417 Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49 KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-25716 Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path. KEVCVSS 3.1CRITICAL 9.1
  • TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
  • TI-2019-00184 Use after free in Apache HTTP Server KEVCVSS 3.1HIGH 7.8
  • TI-2009-03392 The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft… CVSS 3.1CRITICAL 9.8
See all 349 →

Sources

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