A security flaw was found in the chap_server_compute_md5() function in the ISCSI target code in the Linux kernel in a way an authentication request from an ISCSI initiator is processed. An unauthenticated remote attacker can cause a stack buffer overflow and smash up to 17 bytes of the stack. The attack requires the iSCSI target to be enabled on the victim host. Depending on how the target's code was built (i.e. depending on a compiler, compile flags and hardware architecture) an attack may lead to a system crash and thus to a denial-of-service or possibly to a non-authorized access to data exported by an iSCSI target. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is highly unlikely. Kernel versions 4.18.x, 4.14.x and 3.10.x are believed to be vulnerable.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.0, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts limited data confidentiality, limited integrity, and availability (service disruption) for affected systems. Impacting 8 products from linux, from canonical, from debian 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.
2018-09-25T00:29:00.357
2024-11-21T03:49:28.320
Modified
CVSSv3.1: 7.0 (HIGH)
AV:N/AC:M/Au:N/C:P/I:P/A:C
8.6
8.5
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | linux | linux_kernel | < 3.16.59 | Yes |
| Operating System | linux | linux_kernel | < 3.18.124 | Yes |
| Operating System | linux | linux_kernel | < 4.4.159 | Yes |
| Operating System | linux | linux_kernel | < 4.9.130 | Yes |
| Operating System | linux | linux_kernel | < 4.14.73 | Yes |
| Operating System | linux | linux_kernel | < 4.18.11 | 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 | 18.04 | Yes |
| Operating System | debian | debian_linux | 8.0 | Yes |
| Operating System | debian | debian_linux | 9.0 | Yes |
| Operating System | redhat | enterprise_linux_eus | 7.4 | Yes |
| Operating System | redhat | enterprise_linux_eus | 7.6 | Yes |
| Operating System | redhat | enterprise_linux_server | 7.0 | Yes |
| Operating System | redhat | enterprise_linux_server_aus | 7.4 | Yes |
| Operating System | redhat | enterprise_linux_server_aus | 7.6 | Yes |
| Operating System | redhat | enterprise_linux_server_tus | 7.4 | Yes |
| Operating System | redhat | enterprise_linux_server_tus | 7.6 | Yes |
| Operating System | redhat | enterprise_linux_workstation | 7.0 | 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 linux'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.