Vulnerability details
CVE-2024-38475
Actively exploited
Apache http_serverApache Software Foundation Apache HTTP ServerNETAPP ONTAP 9
Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path.
CVSS 3.1
9.1Critical
Official description
Improper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure. Substitutions in server context that use a backreferences or variables as the first segment of the substitution are affected. Some unsafe RewiteRules will be broken by this change and the rewrite flag "UnsafePrefixStat" can be used to opt back in once ensuring the substitution is appropriately constrained.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.1Critical | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Apache | http_server | 2.4.0 ≤ v ≤ 2.4.59 | CISA ADP / Vulnrichment |
| Apache Software Foundation | Apache HTTP Server | 2.4.0 ≤ v ≤ 2.4.59 | CVEProject cvelistV5 (CNA) |
| NETAPP | ONTAP 9 | All | CISA ADP / Vulnrichment |
References and advisories
7- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-38475 government-resource
- https://www.blackhat.com/us-24/briefings/schedule/index.html#confusion-attacks-exploiting-hidden-semantic-ambiguity-in-apache-http-server-pre-recorded-40227
- https://github.com/apache/httpd/commit/9a6157d1e2f7ab15963020381054b48782bc18cf
- https://httpd.apache.org/security/vulnerabilities_24.html vendor-advisory
- https://security.netapp.com/advisory/ntap-20240712-0001/
- http://www.openwall.com/lists/oss-security/2024/07/01/8
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0018
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Details
- Published
- 2024-07-01
- Last updated
- 2025-11-04
- State
- Published
- Assigner (CNA)
- apache
- Kolun priority
- 89 · Critical
CISA KEV catalog
- Date added
- 2025-05-01
- Due date
- 2025-05-22
- Used in ransomware
- Unknown
Exploit prediction (EPSS)
99.95%
Probability of exploitation in 30 days
99.9%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Active
- Technical impact
- Total
Weaknesses (CWE)
- CWE-116Improper Encoding or Escaping of Output