CVE-2019-9213

Public Exploit

Description

In the Linux kernel before 4.20.14, expand_downwards in mm/mmap.c lacks a check for the mmap minimum address, which makes it easier for attackers to exploit kernel NULL pointer dereferences on non-SMAP platforms. This is related to a capability check for the wrong task.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 7.98% Top 10%
Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory kernel.org Vendor Advisory kernel.org Vendor Advisory kernel.org Vendor Advisory kernel.org Vendor Advisory kernel.org Vendor Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.exploit-db.com/exploits/46502/ third party advisory vdb entry exploit
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0a1d52994d440e21def1c2174932410b4f2a98a1 patch vendor advisory
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.162 patch vendor advisory mailing list
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.27 patch vendor advisory mailing list
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.105 patch vendor advisory mailing list
https://github.com/torvalds/linux/commit/0a1d52994d440e21def1c2174932410b4f2a98a1 patch vendor advisory mailing list
http://www.securityfocus.com/bid/107296 third party advisory vdb entry
https://bugs.chromium.org/p/project-zero/issues/detail?id=1792 mailing list third party advisory exploit
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.14 patch vendor advisory mailing list
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html third party advisory mailing list
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00045.html vendor advisory mailing list third party advisory
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html third party advisory mailing list
https://usn.ubuntu.com/3932-1/ third party advisory vendor advisory
https://usn.ubuntu.com/3932-2/ third party advisory vendor advisory
https://usn.ubuntu.com/3930-1/ third party advisory vendor advisory
https://usn.ubuntu.com/3931-1/ third party advisory vendor advisory
https://usn.ubuntu.com/3933-2/ third party advisory vendor advisory
https://usn.ubuntu.com/3931-2/ third party advisory vendor advisory
https://usn.ubuntu.com/3930-2/ third party advisory vendor advisory
https://usn.ubuntu.com/3933-1/ third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00052.html vendor advisory mailing list third party advisory
https://access.redhat.com/errata/RHSA-2019:0831 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html third party advisory mailing list
https://access.redhat.com/errata/RHSA-2019:1479 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:1480 third party advisory vendor advisory
http://packetstormsecurity.com/files/156053/Reliable-Datagram-Sockets-RDS-rds_atomic_free_op-Privilege-Escalation.html third party advisory vdb entry exploit

Frequently Asked Questions

What is the severity of CVE-2019-9213?
CVE-2019-9213 has been scored as a medium severity vulnerability.
How to fix CVE-2019-9213?
To fix CVE-2019-9213, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-9213 being actively exploited in the wild?
It is possible that CVE-2019-9213 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~8% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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