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CVE-2017-7184

HIGHCVSS 7.8/10EPSS 1.76%

Last modified

CVE-2017-7184 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. The xfrm_replay_verify_len function in net/xfrm/xfrm_user.c in the Linux kernel through 4.10.6 does not validate certain size data after an XFRM_MSG_NEWAE update, which allows local users to obtain root privileges or cause a denial of service (heap-based out-of-bounds access) by leveraging the CAP_NET_ADMIN capability, as demonstrated during a Pwn2Own competition at CanSecWest 2017 for the Ubuntu 16.10 linux-image-* package 4.8.0.41.52.. EPSS estimates a 1.76% chance of exploitation in the next 30 days.

Description

The xfrm_replay_verify_len function in net/xfrm/xfrm_user.c in the Linux kernel through 4.10.6 does not validate certain size data after an XFRM_MSG_NEWAE update, which allows local users to obtain root privileges or cause a denial of service (heap-based out-of-bounds access) by leveraging the CAP_NET_ADMIN capability, as demonstrated during a Pwn2Own competition at CanSecWest 2017 for the Ubuntu 16.10 linux-image-* package 4.8.0.41.52.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
1.76%

75.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
LinuxLinux Kernel4.8
LinuxLinux Kernel< 3.2.89
LinuxLinux Kernel>= 3.3, < 3.10.106
LinuxLinux Kernel>= 3.11, < 3.12.73
LinuxLinux Kernel>= 3.13, < 3.16.44
LinuxLinux Kernel>= 3.17, < 3.18.49
LinuxLinux Kernel>= 3.19, < 4.1.49
LinuxLinux Kernel>= 4.2, < 4.4.59
LinuxLinux Kernel>= 4.5, < 4.9.20
LinuxLinux Kernel>= 4.10, < 4.10.8

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2017-7184?
The xfrm_replay_verify_len function in net/xfrm/xfrm_user.c in the Linux kernel through 4.10.6 does not validate certain size data after an XFRM_MSG_NEWAE update, which allows local users to obtain root privileges or cause a denial of service (heap-based out-of-bounds access) by leveraging the CAP_NET_ADMIN capability, as demonstrated during a Pwn2Own competition at CanSecWest 2017 for the Ubuntu 16.10 linux-image-* package 4.8.0.41.52.
How severe is CVE-2017-7184?
CVE-2017-7184 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.76% probability of exploitation in the next 30 days.
How do I fix CVE-2017-7184?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST