Bug 1774991 (CVE-2019-19047) - CVE-2019-19047 kernel: dos in mlx5_fw_fatal_reporter_dump() function in drivers/net/ethernet/mellanox/mlx5/core/health.c
Summary: CVE-2019-19047 kernel: dos in mlx5_fw_fatal_reporter_dump() function in drive...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-19047
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1724336 1774992 1829237 1829238
Blocks: 1775027
TreeView+ depends on / blocked
 
Reported: 2019-11-21 11:10 UTC by Dhananjay Arunesh
Modified: 2023-03-24 16:08 UTC (History)
43 users (show)

Fixed In Version:
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Doc Text:
A flaw was found in the way the Mellanox 5th generation network adapters (ConnectX series) core driver in the Linux kernel handled resource cleanup in the mlx5_fw_fatal_reporter_dump function. This flaw allows an attacker with the ability to trigger errors in the mlx5_crdump_collect function to crash the system.
Clone Of:
Environment:
Last Closed: 2021-10-25 22:13:47 UTC
Embargoed:

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Description Dhananjay Arunesh 2019-11-21 11:10:54 UTC 
A vulnerability was found in Linux Kernel where, a memory leak in the mlx5_fw_fatal_reporter_dump() function in drivers/net/ethernet/mellanox/mlx5/core/health.c allows attackers to cause a denial of service (memory consumption) by triggering mlx5_crdump_collect() failures.

Reference:
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.11
https://github.com/torvalds/linux/commit/c7ed6d0183d5ea9bc31bcaeeba4070bd62546471
Comment 1 Dhananjay Arunesh 2019-11-21 11:11:28 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1774992]
Comment 2 Justin M. Forbes 2019-11-21 16:34:09 UTC 
This was fixed for Fedora with the 5.3.11 stable update.
Comment 5 Petr Matousek 2020-04-29 09:20:37 UTC 
Mitigation:

In order to mitigate this issue it is possible to prevent the affected code from being loaded by blacklisting the kernel module mlx5_core. For instructions relating to how to blacklist a kernel module refer to: https://access.redhat.com/solutions/41278 .
Comment 6 Petr Matousek 2020-04-29 09:21:15 UTC 
Statement:

This issue is rated as having Low impact because of the preconditions needed to trigger the resource cleanup code path.
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