SB2019072615 - Buffer overflow in Linux kernel

Description

This security bulletin contains information about 1 vulnerability.

1) Buffer overflow (CVE-ID: CVE-2018-20855)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local attacker to access sensitive information on a targeted system.

The vulnerability exists due to insufficient initialization of the "mlx5_ib_create_qp_resp" function in the "create_qp_common" function in the "drivers/infiniband/hw/mlx5/qp.c" file. A local authenticated attacker can access the system, execute an application that submits malicious input, leak stack memory and access sensitive information on a targeted system.

Remediation

Install update from vendor's website.

References

• https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.7
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0625b4ba1a5d4703c7fb01c497bd6c156908af00
• https://github.com/torvalds/linux/commit/0625b4ba1a5d4703c7fb01c497bd6c156908af00