Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2017-18017

Use After Free

Published: Jan 03, 2018 | Modified: Jan 03, 2025
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
10 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C
RedHat/V2
RedHat/V3
6.5 MODERATE
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2017-18017
CWEhttps://cwe.mitre.org/data/definitions/416.html

The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before 4.11, and 4.9.x before 4.9.36, allows remote attackers to cause a denial of service (use-after-free and memory corruption) or possibly have unspecified other impact by leveraging the presence of xt_TCPMSS in an iptables action.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

NameVendorStart VersionEnd Version
Linux_kernelLinux3.2 (including)3.2.99 (excluding)
Linux_kernelLinux3.3 (including)3.10.108 (excluding)
Linux_kernelLinux3.11 (including)3.16.54 (excluding)
Linux_kernelLinux3.17 (including)3.18.60 (excluding)
Linux_kernelLinux3.19 (including)4.1.43 (excluding)
Linux_kernelLinux4.2 (including)4.4.76 (excluding)
Linux_kernelLinux4.5 (including)4.9.36 (excluding)
Linux_kernelLinux4.10 (including)4.11 (excluding)
Red Hat Enterprise Linux 6RedHatkernel-0:2.6.32-696.28.1.el6*
Red Hat Enterprise Linux 7RedHatkernel-rt-0:3.10.0-862.rt56.804.el7*
Red Hat Enterprise Linux 7RedHatkernel-0:3.10.0-862.el7*
Red Hat Enterprise Linux 7.3 Extended Update SupportRedHatkernel-0:3.10.0-514.51.1.el7*
Red Hat Enterprise Linux 7.4 Extended Update SupportRedHatkernel-0:3.10.0-693.25.2.el7*
Red Hat Enterprise MRG 2RedHatkernel-rt-1:3.10.0-693.25.2.rt56.612.el6rt*
LinuxUbuntuesm-infra-legacy/trusty*
LinuxUbuntuesm-infra/xenial*
LinuxUbuntuprecise/esm*
LinuxUbuntutrusty*
LinuxUbuntutrusty/esm*
LinuxUbuntuupstream*
LinuxUbuntuxenial*
LinuxUbuntuzesty*
Linux-awsUbuntuesm-infra/xenial*
Linux-awsUbuntuupstream*
Linux-awsUbuntuxenial*
Linux-aws-5.15Ubuntuupstream*
Linux-aws-5.4Ubuntuupstream*
Linux-aws-6.14Ubuntuupstream*
Linux-aws-6.8Ubuntuupstream*
Linux-aws-fipsUbuntutrusty*
Linux-aws-fipsUbuntuupstream*
Linux-aws-fipsUbuntuxenial*
Linux-aws-hweUbuntuupstream*
Linux-azureUbuntuupstream*
Linux-azure-4.15Ubuntuupstream*
Linux-azure-5.15Ubuntuupstream*
Linux-azure-5.4Ubuntuupstream*
Linux-azure-6.11Ubuntunoble*
Linux-azure-6.11Ubuntuupstream*
Linux-azure-6.8Ubuntuupstream*
Linux-azure-fdeUbuntuesm-infra/focal*
Linux-azure-fdeUbuntufocal*
Linux-azure-fdeUbuntuupstream*
Linux-azure-fde-5.15Ubuntuesm-infra/focal*
Linux-azure-fde-5.15Ubuntufocal*
Linux-azure-fde-5.15Ubuntuupstream*
Linux-azure-fipsUbuntutrusty*
Linux-azure-fipsUbuntuupstream*
Linux-azure-fipsUbuntuxenial*
Linux-azure-nvidiaUbuntuupstream*
Linux-bluefieldUbuntuupstream*
Linux-euclidUbuntuupstream*
Linux-euclidUbuntuxenial*
Linux-fipsUbuntufips/xenial*
Linux-fipsUbuntuupstream*
Linux-floUbuntutrusty*
Linux-floUbuntuupstream*
Linux-floUbuntuxenial*
Linux-gcpUbuntuesm-infra/xenial*
Linux-gcpUbuntuupstream*
Linux-gcpUbuntuxenial*
Linux-gcp-4.15Ubuntuupstream*
Linux-gcp-5.15Ubuntuupstream*
Linux-gcp-5.4Ubuntuupstream*
Linux-gcp-6.11Ubuntunoble*
Linux-gcp-6.11Ubuntuupstream*
Linux-gcp-6.14Ubuntuupstream*
Linux-gcp-6.8Ubuntuupstream*
Linux-gcp-fipsUbuntutrusty*
Linux-gcp-fipsUbuntuupstream*
Linux-gcp-fipsUbuntuxenial*
Linux-gkeUbuntuesm-infra/focal*
Linux-gkeUbuntufocal*
Linux-gkeUbuntuupstream*
Linux-gkeUbuntuxenial*
Linux-gkeopUbuntuupstream*
Linux-gkeop-5.15Ubuntuupstream*
Linux-goldfishUbuntutrusty*
Linux-goldfishUbuntuupstream*
Linux-goldfishUbuntuxenial*
Linux-goldfishUbuntuzesty*
Linux-grouperUbuntutrusty*
Linux-grouperUbuntuupstream*
Linux-hweUbuntuesm-infra/xenial*
Linux-hweUbuntuupstream*
Linux-hweUbuntuxenial*
Linux-hwe-5.15Ubuntuupstream*
Linux-hwe-5.4Ubuntuupstream*
Linux-hwe-6.11Ubuntunoble*
Linux-hwe-6.11Ubuntuupstream*
Linux-hwe-6.14Ubuntuupstream*
Linux-hwe-6.8Ubuntuupstream*
Linux-hwe-edgeUbuntuesm-infra/xenial*
Linux-hwe-edgeUbuntuupstream*
Linux-hwe-edgeUbuntuxenial*
Linux-ibmUbuntuupstream*
Linux-ibm-5.15Ubuntuupstream*
Linux-ibm-5.4Ubuntuupstream*
Linux-ibm-6.8Ubuntuupstream*
Linux-intelUbuntuupstream*
Linux-intel-iot-realtimeUbuntujammy*
Linux-intel-iot-realtimeUbuntuupstream*
Linux-intel-iotgUbuntuupstream*
Linux-intel-iotg-5.15Ubuntuupstream*
Linux-iotUbuntuupstream*
Linux-kvmUbuntuupstream*
Linux-lowlatencyUbuntuupstream*
Linux-lowlatency-hwe-5.15Ubuntuupstream*
Linux-lowlatency-hwe-6.11Ubuntunoble*
Linux-lowlatency-hwe-6.11Ubuntuupstream*
Linux-lowlatency-hwe-6.8Ubuntuupstream*
Linux-lts-quantalUbuntuprecise/esm*
Linux-lts-quantalUbuntuupstream*
Linux-lts-raringUbuntuprecise/esm*
Linux-lts-raringUbuntuupstream*
Linux-lts-saucyUbuntuprecise/esm*
Linux-lts-saucyUbuntuupstream*
Linux-lts-trustyUbuntuupstream*
Linux-lts-utopicUbuntutrusty*
Linux-lts-utopicUbuntuupstream*
Linux-lts-vividUbuntutrusty*
Linux-lts-vividUbuntutrusty/esm*
Linux-lts-vividUbuntuupstream*
Linux-lts-wilyUbuntutrusty*
Linux-lts-wilyUbuntuupstream*
Linux-lts-xenialUbuntuesm-infra-legacy/trusty*
Linux-lts-xenialUbuntutrusty*
Linux-lts-xenialUbuntutrusty/esm*
Linux-lts-xenialUbuntuupstream*
Linux-maguroUbuntutrusty*
Linux-maguroUbuntuupstream*
Linux-makoUbuntutrusty*
Linux-makoUbuntuupstream*
Linux-makoUbuntuxenial*
Linux-mantaUbuntutrusty*
Linux-mantaUbuntuupstream*
Linux-nvidiaUbuntuupstream*
Linux-nvidia-6.11Ubuntuupstream*
Linux-nvidia-6.5Ubuntuupstream*
Linux-nvidia-6.8Ubuntuupstream*
Linux-nvidia-lowlatencyUbuntuupstream*
Linux-nvidia-tegraUbuntuupstream*
Linux-nvidia-tegra-5.15Ubuntuupstream*
Linux-nvidia-tegra-igxUbuntuupstream*
Linux-oemUbuntuupstream*
Linux-oem-6.11Ubuntuupstream*
Linux-oem-6.14Ubuntuupstream*
Linux-oem-6.8Ubuntuupstream*
Linux-oracleUbuntuupstream*
Linux-oracle-5.15Ubuntuupstream*
Linux-oracle-5.4Ubuntuupstream*
Linux-oracle-6.14Ubuntuupstream*
Linux-oracle-6.8Ubuntuupstream*
Linux-raspiUbuntuupstream*
Linux-raspi-5.4Ubuntuupstream*
Linux-raspi-realtimeUbuntunoble*
Linux-raspi-realtimeUbuntuupstream*
Linux-raspi2Ubuntuesm-infra/focal*
Linux-raspi2Ubuntufocal*
Linux-raspi2Ubuntuupstream*
Linux-raspi2Ubuntuxenial*
Linux-raspi2Ubuntuzesty*
Linux-realtimeUbuntujammy*
Linux-realtimeUbuntuupstream*
Linux-realtime-6.14Ubuntuupstream*
Linux-realtime-6.8Ubuntuupstream*
Linux-riscvUbuntuesm-infra/focal*
Linux-riscvUbuntufocal*
Linux-riscvUbuntujammy*
Linux-riscvUbuntuupstream*
Linux-riscv-5.15Ubuntuupstream*
Linux-riscv-6.14Ubuntuupstream*
Linux-riscv-6.8Ubuntuupstream*
Linux-snapdragonUbuntuupstream*
Linux-snapdragonUbuntuxenial*
Linux-snapdragonUbuntuzesty*
Linux-xilinx-zynqmpUbuntuupstream*

Potential Mitigations

References

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