In Apache httpd 2.0.23 to 2.0.65, 2.2.0 to 2.2.34, and 2.4.0 to 2.4.29, mod_authnz_ldap, if configured with AuthLDAPCharsetConfig, uses the Accept-Language header value to lookup the right charset encoding when verifying the user's credentials. If the header value is not present in the charset conversion table, a fallback mechanism is used to truncate it to a two characters value to allow a quick retry (for example, 'en-US' is truncated to 'en'). A header value of less than two characters forces an out of bound write of one NUL byte to a memory location that is not part of the string. In the worst case, quite unlikely, the process would crash which could be used as a Denial of Service attack. In the more likely case, this memory is already reserved for future use and the issue has no effect at all.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 8 products from apache, from debian, from canonical and 5 others, organizations running these solutions should prioritize assessment and patching.
First disclosed in 2018, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.
2018-03-26T15:29:00.227
2024-11-21T03:15:03.740
Modified
CVSSv3.0: 7.5 (HIGH)
AV:N/AC:L/Au:N/C:N/I:N/A:P
10.0
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | apache | http_server | 2.4.1 | Yes |
| Application | apache | http_server | 2.4.2 | Yes |
| Application | apache | http_server | 2.4.3 | Yes |
| Application | apache | http_server | 2.4.4 | Yes |
| Application | apache | http_server | 2.4.6 | Yes |
| Application | apache | http_server | 2.4.7 | Yes |
| Application | apache | http_server | 2.4.9 | Yes |
| Application | apache | http_server | 2.4.10 | Yes |
| Application | apache | http_server | 2.4.12 | Yes |
| Application | apache | http_server | 2.4.16 | Yes |
| Application | apache | http_server | 2.4.17 | Yes |
| Application | apache | http_server | 2.4.18 | Yes |
| Application | apache | http_server | 2.4.20 | Yes |
| Application | apache | http_server | 2.4.23 | Yes |
| Application | apache | http_server | 2.4.25 | Yes |
| Application | apache | http_server | 2.4.26 | Yes |
| Application | apache | http_server | 2.4.27 | Yes |
| Application | apache | http_server | 2.4.28 | Yes |
| Application | apache | http_server | 2.4.29 | Yes |
| Operating System | debian | debian_linux | 7.0 | Yes |
| Operating System | debian | debian_linux | 8.0 | Yes |
| Operating System | debian | debian_linux | 9.0 | Yes |
| Operating System | canonical | ubuntu_linux | 12.04 | Yes |
| Operating System | canonical | ubuntu_linux | 14.04 | Yes |
| Operating System | canonical | ubuntu_linux | 16.04 | Yes |
| Operating System | canonical | ubuntu_linux | 17.10 | Yes |
| Operating System | canonical | ubuntu_linux | 18.04 | Yes |
| Application | netapp | santricity_cloud_connector | - | Yes |
| Application | netapp | storage_automation_store | - | Yes |
| Application | netapp | storagegrid | - | Yes |
| Operating System | netapp | clustered_data_ontap | - | Yes |
| Operating System | redhat | enterprise_linux | 6.0 | Yes |
| Operating System | redhat | enterprise_linux | 7.0 | Yes |
| Operating System | redhat | enterprise_linux | 7.4 | Yes |
| Operating System | redhat | enterprise_linux | 7.5 | Yes |
| Operating System | redhat | enterprise_linux | 7.6 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For apache's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.