#VU14920 Stack-based buffer overflow in Linux kernel - CVE-2018-14633
Published: September 29, 2018 / Updated: October 23, 2018
Vulnerability identifier: #VU14920
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2018-14633
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing client digest packets in chap_server_compute_md5() function when processing authentication request from an ISCSI initiator. A remote attacker can send an overly long value (longer than 32 bytes), trigger stack-based buffer overflow and execute arbitrary code on the target system.
Remediation
Install updated from vendor's repository.
External links
- https://seclists.org/oss-sec/2018/q3/270
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.73
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.11
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.159
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.130
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19