Multiple vulnerabilities in Linux kernel



Published: 2019-11-18 | Updated: 2020-07-17
Risk High
Patch available YES
Number of vulnerabilities 7
CVE-ID CVE-2019-19807
CVE-2019-19529
CVE-2019-19044
CVE-2019-19045
CVE-2019-19047
CVE-2019-19051
CVE-2019-19052
CWE-ID CWE-416
CWE-400
CWE-401
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains information about 7 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU30551

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-19807

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local authenticated user to execute arbitrary code.

In the Linux kernel before 5.3.11, sound/core/timer.c has a use-after-free caused by erroneous code refactoring, aka CID-e7af6307a8a5. This is related to snd_timer_open and snd_timer_close_locked. The timeri variable was originally intended to be for a newly created timer instance, but was used for a different purpose after refactoring.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.3.1 - 5.3.10

External links

http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.11
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e7af6307a8a54f0b873960b32b6a644f2d0fbd97
http://github.com/torvalds/linux/commit/e7af6307a8a54f0b873960b32b6a644f2d0fbd97
http://security.netapp.com/advisory/ntap-20200103-0001/
http://usn.ubuntu.com/4225-1/
http://usn.ubuntu.com/4227-1/
http://usn.ubuntu.com/4227-2/


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Use-after-free

EUVDB-ID: #VU30565

Risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-19529

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to use-after-free error in the drivers/net/can/usb/mcba_usb.c driver, aka CID-4d6636498c41. A local user can use a malicious USB device to trigger use-after-free error and execute arbitrary code on the system with elevated privileges.

Mitigation

Update to version 5.3.11.

Vulnerable software versions

Linux kernel: 5.3.1 - 5.3.10

External links

http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.html
http://www.openwall.com/lists/oss-security/2019/12/03/4
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.11
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4d6636498c41891d0482a914dd570343a838ad79
http://usn.ubuntu.com/4225-1/
http://usn.ubuntu.com/4225-2/
http://usn.ubuntu.com/4226-1/
http://usn.ubuntu.com/4227-1/
http://usn.ubuntu.com/4227-2/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Resource exhaustion

EUVDB-ID: #VU30601

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-19044

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

Two memory leaks in the v3d_submit_cl_ioctl() function in drivers/gpu/drm/v3d/v3d_gem.c in the Linux kernel before 5.3.11 allow attackers to cause a denial of service (memory consumption) by triggering kcalloc() or v3d_job_init() failures, aka CID-29cd13cfd762.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.3.1 - 5.3.10

External links

http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.11
http://github.com/torvalds/linux/commit/29cd13cfd7624726d9e6becbae9aa419ef35af7f
http://security.netapp.com/advisory/ntap-20191205-0001/
http://usn.ubuntu.com/4225-1/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Memory leak

EUVDB-ID: #VU30602

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-19045

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the mlx5_fpga_conn_create_cq() function in drivers/net/ethernet/mellanox/mlx5/core/fpga/conn.c in the Linux kernel before 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering mlx5_vector2eqn() failures, aka CID-c8c2a057fdc7. A remote attacker can perform a denial of service attack.

Mitigation

Update to version 5.3.11.

Vulnerable software versions

Linux kernel: 5.3.1 - 5.3.10

External links

http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.11
http://github.com/torvalds/linux/commit/c8c2a057fdc7de1cd16f4baa51425b932a42eb39
http://security.netapp.com/advisory/ntap-20191205-0001/
http://usn.ubuntu.com/4225-1/
http://usn.ubuntu.com/4225-2/
http://usn.ubuntu.com/4226-1/
http://usn.ubuntu.com/4227-1/
http://usn.ubuntu.com/4227-2/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Memory leak

EUVDB-ID: #VU30603

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-19047

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the mlx5_fw_fatal_reporter_dump() function in drivers/net/ethernet/mellanox/mlx5/core/health.c in the Linux kernel before 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering mlx5_crdump_collect() failures, aka CID-c7ed6d0183d5. A remote attacker can perform a denial of service attack.

Mitigation

Update to version 5.3.11.

Vulnerable software versions

Linux kernel: 5.3.1 - 5.3.10

External links

http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.11
http://github.com/torvalds/linux/commit/c7ed6d0183d5ea9bc31bcaeeba4070bd62546471
http://security.netapp.com/advisory/ntap-20191205-0001/
http://usn.ubuntu.com/4225-1/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

6) Memory leak

EUVDB-ID: #VU30604

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-19051

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the i2400m_op_rfkill_sw_toggle() function in drivers/net/wimax/i2400m/op-rfkill.c in the Linux kernel before 5.3.11 allows attackers to cause a denial of service (memory consumption), aka CID-6f3ef5c25cc7. A remote attacker can perform a denial of service attack.

Mitigation

Update to version 5.3.11.

Vulnerable software versions

Linux kernel: 5.3.1 - 5.3.10

External links

http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.11
http://github.com/torvalds/linux/commit/6f3ef5c25cc762687a7341c18cbea5af54461407
http://lists.debian.org/debian-lts-announce/2020/01/msg00013.html
http://lists.debian.org/debian-lts-announce/2020/03/msg00001.html
http://security.netapp.com/advisory/ntap-20191205-0001/
http://usn.ubuntu.com/4225-1/
http://usn.ubuntu.com/4225-2/
http://usn.ubuntu.com/4286-1/
http://usn.ubuntu.com/4286-2/
http://usn.ubuntu.com/4302-1/
http://usn.ubuntu.com/4344-1/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

7) Memory leak

EUVDB-ID: #VU30605

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-19052

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the gs_can_open() function in drivers/net/can/usb/gs_usb.c in the Linux kernel before 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering usb_submit_urb() failures, aka CID-fb5be6a7b486. A remote attacker can perform a denial of service attack.

Mitigation

Update to version 5.3.11.

Vulnerable software versions

Linux kernel: 5.3.1 - 5.3.10

External links

http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.html
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.11
http://github.com/torvalds/linux/commit/fb5be6a7b4863ecc44963bb80ca614584b6c7817
http://lists.debian.org/debian-lts-announce/2020/01/msg00013.html
http://lists.debian.org/debian-lts-announce/2020/03/msg00001.html
http://security.netapp.com/advisory/ntap-20191205-0001/
http://usn.ubuntu.com/4225-1/
http://usn.ubuntu.com/4225-2/
http://usn.ubuntu.com/4226-1/
http://usn.ubuntu.com/4227-1/
http://usn.ubuntu.com/4227-2/
http://usn.ubuntu.com/4228-1/
http://usn.ubuntu.com/4228-2/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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