SB2019022216 - Use-after-free in Linux kernel
Published: February 22, 2019 Updated: July 17, 2020
Security Bulletin ID
SB2019022216
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2019-9003)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 8.7 [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]
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.
Remediation
Install update from vendor's website.
References
- 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/