Linux Kernel xenvif_set_hash_mapping Function Out-of-Bounds Access Vulnerability [CVE-2018-15471]

CVE Number – CVE-2018-15471

A vulnerability in the Linux Kernel could allow a local attacker to access sensitive information, escalate privileges, or cause a denial of service (DoS) condition on a targeted system.

The vulnerability is due to improper input validation by the xenvif_set_hash_mapping function, as defined in the drivers/net/xen-netback/hash.c source code file of the affected software. A local attacker could exploit this vulnerability by sending a malicious mapping request. A successful exploit could cause an out-of-bounds memory access condition, which could allow the attacker to access sensitive information, escalate privileges, or cause a DoS condition on the targeted system.

Kernel.org confirmed the vulnerability and released software updates.

Analysis
  • To exploit this vulnerability, the attacker must have local access to the targeted system. This access requirement may reduce the likelihood of a successful exploit.
Safeguards
  • Administrators are advised to allow only trusted users to access local systems.

    Administrators are advised to allow only privileged users to access administration or management systems.

    Administrators are advised to monitor critical systems.

Vendor Announcements
Fixed Software




Duncan Newell

Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.

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