Apache HTTP Server: Improper Validation of Specified Quantity in Input
CVE-2023-38709 is a high-severity improper validation of specified quantity in input vulnerability in Apache HTTP Server from Apache, with a CVSS 3.1 base score of 7.3 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Apache HTTP Server versions: 2.4.58 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 3.91% chance of exploitation within 30 days, which is in the top 9.52% of all scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update macOS to 14.6 or a later version.
- Read the advisory on httpd.apache.org for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Apache | Apache HTTP Server | 2.4.58 and earlier | Not stated |
| Apache | http_server | 2.4.58 and earlier | Not stated |
| Debian | Debian Linux | 10.0 | Not stated |
| Fedora Project | Fedora | 38; 39; 40 | Not stated |
| NetApp | Ontap | 9 | Not stated |
| NetApp | Ontap Tools | 10 | Not stated |
| Broadcom | Fabric Operating System | Not specified in the record | Not stated |
| Apple | macOS | before 14.6 | 14.6 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- LowSome restricted data can be read.
- Integrity
- LowLimited modification of data is possible.
- Availability
- LowPerformance or availability is reduced.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L. Scored by CISA (ADP).
Official description
Faulty input validation in the core of Apache allows malicious or exploitable backend/content generators to split HTTP responses. This issue affects Apache HTTP Server: through 2.4.58.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Validation of Specified Quantity in Input
The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.
More Improper Validation of Specified Quantity in Input vulnerabilities (CWE-1284)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- seclists.org/fulldisclosure/2024/Jul/18Mailing List, Third Party Advisory
- openwall.com/lists/oss-security/2024/04/04/3Mailing List, Third Party Advisory
- lists.debian.org/debian-lts-announce/2024/05/msg00013.htmlMailing List, Third Party Advisory
- lists.fedoraproject.org/archives/list/[email protected]/message/I2N2NZEX3MR64IWSGL3QGN…Mailing List, Third Party Advisory
- lists.fedoraproject.org/archives/list/[email protected]/message/LX5U34KYGDYPRH3AJ6MDDC…Mailing List, Third Party Advisory
- lists.fedoraproject.org/archives/list/[email protected]/message/WNV4SZAPVS43DZWNFU7XBY…Mailing List, Third Party Advisory
- security.netapp.com/advisory/ntap-20240415-0013/Third Party Advisory
- support.apple.com/kb/HT214119Third Party Advisory
Other references
Other vulnerabilities in Apache HTTP Server
- 8.1 High severity
- 8.8 High severity
- 7.3 High severity
- 8.1 High severity
- 7.5 High severity
- 7.5 High severity
Recent Improper Validation of Specified Quantity in Input vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 8.1 High severity
- 7.5 High severity
- 7.5 High severity
Spotted an error? Tell us.