UBUNTU-CVE-2021-47587: Low severity ubuntu/linux-azure vulnerability

Q: Which systems are most exposed to this issue?

Systems using the SYSTEMPORT network driver are implicated, particularly when multiple transmit queues or flows are active concurrently. The affected Ubuntu kernel package families listed are linux, linux-aws, linux-azure, linux-gcp, and their FIPS variants.

Q: What access is required to exploit the issue?

The supplied severity vector indicates local access, low privileges, and low attack complexity, with no user interaction required. It also indicates attack prerequisites are present.

Q: What symptoms can indicate the problem is occurring?

Under concurrent use of multiple transmit queues, hardware may process corrupted descriptors. Reported effects include UDP and TCP checksums that are correct for an incorrect packet length.

Published Jun 19, 2024

Updated

In the Linux kernel, the following vulnerability has been resolved: net: systemport: Add global locking for descriptor lifecycle The descriptor list is a shared resource across all of the transmit queues, and the locking mechanism used today only protects concurrency across a given transmit queue between the transmit and reclaiming. This creates an opportunity for the SYSTEMPORT hardware to work on corrupted descriptors if we have multiple producers at once which is the case when using multiple transmit queues. This was particularly noticeable when using multiple flows/transmit queues and it showed up in interesting ways in that UDP packets would get a correct UDP header checksum being calculated over an incorrect packet length. Similarly TCP packets would get an equally correct checksum computed by the hardware over an incorrect packet length. The SYSTEMPORT hardware maintains an internal descriptor list that it re-arranges when the driver produces a new descriptor anytime it writes to the WRITEPORT{HI,LO} registers, there is however some delay in the hardware to re-organize its descriptors and it is possible that concurrent TX queues eventually break this internal allocation scheme to the point where the length/status part of the descriptor gets used for an incorrect data buffer. The fix is to impose a global serialization for all TX queues in the short section where we are writing to the WRITEPORT{HI,LO} registers which solves the corruption even with multiple concurrent TX queues being used.

Affected Software

119 affected componentsFixes available

ubuntu/linux-azure<4.15.0-1131.144~14.04.1

4.15.0-1131.144~14.04.1

ubuntu/linux-aws<4.4.0-1143.149

4.4.0-1143.149

ubuntu/linux-lts-xenial<4.4.0-268.302~14.04.1

4.4.0-268.302~14.04.1

ubuntu/linux<4.4.0-268.302

4.4.0-268.302

ubuntu/linux-aws<4.4.0-1181.196

4.4.0-1181.196

ubuntu/linux-aws-hwe<4.15.0-1120.128~16.04.1

4.15.0-1120.128~16.04.1

ubuntu/linux-azure<4.15.0-1131.144~16.04.1

4.15.0-1131.144~16.04.1

ubuntu/linux-gcp<4.15.0-1116.130~16.04.1

4.15.0-1116.130~16.04.1

ubuntu/linux-hwe<4.15.0-169.177~16.04.1

4.15.0-169.177~16.04.1

ubuntu/linux-kvm<4.4.0-1144.155

4.4.0-1144.155

ubuntu/linux-oracle<4.15.0-1087.95~16.04.1

4.15.0-1087.95~16.04.1

ubuntu/linux-hwe-edge*

ubuntu/linux-fips<4.4.0-1113.120

4.4.0-1113.120

ubuntu/linux-fips*

ubuntu/linux<4.15.0-169.177

4.15.0-169.177

ubuntu/linux-aws<4.15.0-1121.129

4.15.0-1121.129

ubuntu/linux-aws-5.4<5.4.0-1069.73~18.04.1

5.4.0-1069.73~18.04.1

ubuntu/linux-azure-4.15<4.15.0-1131.144

4.15.0-1131.144

ubuntu/linux-azure-5.4<5.4.0-1073.76~18.04.1

5.4.0-1073.76~18.04.1

ubuntu/linux-gcp-4.15<4.15.0-1116.130

4.15.0-1116.130

ubuntu/linux-gcp-5.4<5.4.0-1068.72~18.04.1

5.4.0-1068.72~18.04.1

ubuntu/linux-hwe-5.4<5.4.0-105.119~18.04.1

5.4.0-105.119~18.04.1

ubuntu/linux-ibm-5.4<5.4.0-1018.20~18.04.1

5.4.0-1018.20~18.04.1

ubuntu/linux-kvm<4.15.0-1107.109

4.15.0-1107.109

ubuntu/linux-oracle<4.15.0-1087.95

4.15.0-1087.95

ubuntu/linux-oracle-5.4<5.4.0-1067.72~18.04.1

5.4.0-1067.72~18.04.1

ubuntu/linux-raspi-5.4<5.4.0-1056.63~18.04.1

5.4.0-1056.63~18.04.1

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-azure*

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

ubuntu/linux-gcp-5.3*

ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-edge*

ubuntu/linux-oem*

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-aws-fips<4.15.0-2061.63

4.15.0-2061.63

ubuntu/linux-azure-fips<4.15.0-2043.47

4.15.0-2043.47

ubuntu/linux-fips<4.15.0-1078.87

4.15.0-1078.87

ubuntu/linux-gcp-fips<4.15.0-2026.28

4.15.0-2026.28

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux<5.4.0-105.119

5.4.0-105.119

ubuntu/linux-aws<5.4.0-1069.73

5.4.0-1069.73

ubuntu/linux-azure<5.4.0-1073.76

5.4.0-1073.76

ubuntu/linux-bluefield<5.4.0-1032.35

5.4.0-1032.35

ubuntu/linux-gcp<5.4.0-1068.72

5.4.0-1068.72

ubuntu/linux-gkeop<5.4.0-1037.38

5.4.0-1037.38

ubuntu/linux-ibm<5.4.0-1018.20

5.4.0-1018.20

ubuntu/linux-kvm<5.4.0-1059.62

5.4.0-1059.62

ubuntu/linux-oracle<5.4.0-1067.72

5.4.0-1067.72

ubuntu/linux-raspi<5.4.0-1056.63

5.4.0-1056.63

ubuntu/linux-aws-5.11*

ubuntu/linux-aws-5.13*

ubuntu/linux-aws-5.8*

ubuntu/linux-azure-5.11*

ubuntu/linux-azure-5.13*

ubuntu/linux-azure-5.8*

ubuntu/linux-azure-fde*

ubuntu/linux-gcp-5.11*

ubuntu/linux-gcp-5.13*

ubuntu/linux-gcp-5.8*

ubuntu/linux-gke*

ubuntu/linux-gke-5.15*

ubuntu/linux-hwe-5.11*

ubuntu/linux-hwe-5.13*

ubuntu/linux-hwe-5.8*

ubuntu/linux-intel-5.13*

ubuntu/linux-oem-5.10*

ubuntu/linux-oem-5.13*

ubuntu/linux-oem-5.6*

ubuntu/linux-oracle-5.11*

ubuntu/linux-oracle-5.13*

ubuntu/linux-oracle-5.8*

ubuntu/linux-raspi2*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.11*

ubuntu/linux-riscv-5.8*

ubuntu/linux-aws-fips<5.4.0-1069.73+fips2

5.4.0-1069.73+fips2

ubuntu/linux-azure-fips<5.4.0-1073.76+fips1

5.4.0-1073.76+fips1

ubuntu/linux-fips<5.4.0-1046.52

5.4.0-1046.52

ubuntu/linux-gcp-fips<5.4.0-1067.71~20.04.1

5.4.0-1067.71~20.04.1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-intel-iot-realtime*

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-nvidia-6.2*

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-raspi-realtime*

ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 4.15.0-1131.144~14.04.1
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 4.4.0-1143.149
Upgrade
Upgrade ubuntu/linux-lts-xenial to a version that resolves this vulnerability.
Fixed in 4.4.0-268.302~14.04.1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 4.4.0-268.302
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 4.4.0-1181.196
Upgrade
Upgrade ubuntu/linux-aws-hwe to a version that resolves this vulnerability.
Fixed in 4.15.0-1120.128~16.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 4.15.0-1131.144~16.04.1
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 4.15.0-1116.130~16.04.1
Upgrade
Upgrade ubuntu/linux-hwe to a version that resolves this vulnerability.
Fixed in 4.15.0-169.177~16.04.1
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 4.4.0-1144.155
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 4.15.0-1087.95~16.04.1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 4.4.0-1113.120
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 4.15.0-169.177
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 4.15.0-1121.129
Upgrade
Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1069.73~18.04.1
Upgrade
Upgrade ubuntu/linux-azure-4.15 to a version that resolves this vulnerability.
Fixed in 4.15.0-1131.144
Upgrade
Upgrade ubuntu/linux-azure-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1073.76~18.04.1
Upgrade
Upgrade ubuntu/linux-gcp-4.15 to a version that resolves this vulnerability.
Fixed in 4.15.0-1116.130
Upgrade
Upgrade ubuntu/linux-gcp-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1068.72~18.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-105.119~18.04.1
Upgrade
Upgrade ubuntu/linux-ibm-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1018.20~18.04.1
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 4.15.0-1107.109
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 4.15.0-1087.95
Upgrade
Upgrade ubuntu/linux-oracle-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1067.72~18.04.1
Upgrade
Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1056.63~18.04.1
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2061.63
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2043.47
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-1078.87
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2026.28
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.4.0-105.119
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.4.0-1069.73
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.4.0-1073.76
Upgrade
Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.
Fixed in 5.4.0-1032.35
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.4.0-1068.72
Upgrade
Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.
Fixed in 5.4.0-1037.38
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 5.4.0-1018.20
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.4.0-1059.62
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 5.4.0-1067.72
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 5.4.0-1056.63
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1069.73+fips2
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1073.76+fips1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1046.52
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1067.71~20.04.1
Compensating control
Impose global serialization across all transmit queues while writing to the SYSTEMPORT WRITE_PORT_{HI,LO} registers, preventing concurrent descriptor producers from corrupting the hardware descriptor list.

Event History

Jun 19, 2024

CVE Published

via OSV·03:15 PM

Data Sourced

via OSV·03:15 PM

DescriptionSeverityAffected Software

Frequently Asked Questions

Which systems are most exposed to this issue?

Systems using the SYSTEMPORT network driver are implicated, particularly when multiple transmit queues or flows are active concurrently. The affected Ubuntu kernel package families listed are linux, linux-aws, linux-azure, linux-gcp, and their FIPS variants.

What access is required to exploit the issue?

The supplied severity vector indicates local access, low privileges, and low attack complexity, with no user interaction required. It also indicates attack prerequisites are present.

What symptoms can indicate the problem is occurring?

Under concurrent use of multiple transmit queues, hardware may process corrupted descriptors. Reported effects include UDP and TCP checksums that are correct for an incorrect packet length.

UBUNTU-CVE-2021-47587: Low severity ubuntu/linux-azure vulnerability

Affected Software

Remediation

Event History

Frequently Asked Questions

Which systems are most exposed to this issue?

What access is required to exploit the issue?

What symptoms can indicate the problem is occurring?

Company

Resources

Contact

Frequently Asked Questions

Which systems are most exposed to this issue?

What access is required to exploit the issue?

What symptoms can indicate the problem is occurring?