Security Bulletin: IBM Security QRadar Packet Capture is vulnerable to Denial of Service (CVE-2019-11477, CVE-2019-11478, CVE-2019-11479, CVE-2019-3896)

Summary

Linux kernel as used in IBM Security QRadar Packet Capture is vulnerable to a Denial of Service

Vulnerability Details

CVEID: CVE-2019-11477
**Description:**Linux Kernel is vulnerable to a denial of service, caused by an integer overflow when processing TCP Selective Acknowledgement (SACK) capabilities. By sending specially-crafted SACKs requests, a remote attacker could exploit this vulnerability to cause a kernel panic condition.
**CVSS Base Score:**7.5
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/162662&gt; for the current score
**CVSS Environmental Score:***Undefined
**CVSS Vector:**CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVEID: CVE-2019-11478
**Description:**Linux Kernel is vulnerable to a denial of service, caused by an issue with fragmenting the TCP retransmission queue when processing TCP Selective Acknowledgement (SACK) capabilities. By sending specially-crafted SACKs requests, a remote attacker could exploit this vulnerability to cause an excess of system resource usage.
**CVSS Base Score:**7.5
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/162664&gt; for the current score
**CVSS Environmental Score:***Undefined
**CVSS Vector:**CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVEID: CVE-2019-11479
**Description:**Linux Kernel is vulnerable to a denial of service, caused by a flaw when processing minimum segment size (MSS). By sending specially-crafted MSS traffic, a remote attacker could exploit this vulnerability to cause excess usage of system resources.
**CVSS Base Score:**7.5
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/162665&gt; for the current score
**CVSS Environmental Score:***Undefined
**CVSS Vector:**CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVEID: CVE-2019-3896
**Description:**Linux Kernel could allow a local authenticated attacker to gain elevated privileges on the system, caused by a double free flaw in the idr_remove_all function in in lib/idr.c. By sending a specially-crafted request, an authenticated attacker could exploit this vulnerability to gain elevated privileges or cause the system to crash.
**CVSS Base Score:**7.8
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/162709&gt; for the current score
**CVSS Environmental Score:***Undefined
**CVSS Vector:**CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Products and Versions

IBM Security QRadar Packet Capture 7.2.0 - 7.2.8 Patch 5

IBM Security QRadar Packet Capture 7.3.0 - 7.3.1 Patch 1

Remediation/Fixes

IBM Security QRadar Packet Capture 7.2.8 Patch 6

IBM Security QRadar Packet Capture 7.3.2 GA

Workarounds and Mitigations

None