Use-after-free in Linux kernel - CVE-2019-9003
Published: February 22, 2019 / Updated: July 17, 2020
Vulnerability identifier: #VU31153
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-9003
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
In the Linux kernel before 4.20.5, attackers can trigger a drivers/char/ipmi/ipmi_msghandler.c use-after-free and OOPS by arranging for certain simultaneous execution of the code, as demonstrated by a "service ipmievd restart" loop.
How to mitigate CVE-2019-9003
Install update from vendor's website.
Sources
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=77f8269606bf95fcb232ee86f6da80886f1dfae8
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00037.html
- http://www.securityfocus.com/bid/107145
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.5
- https://github.com/torvalds/linux/commit/77f8269606bf95fcb232ee86f6da80886f1dfae8
- https://security.netapp.com/advisory/ntap-20190327-0002/
- https://usn.ubuntu.com/3930-1/
- https://usn.ubuntu.com/3930-2/