What’s Vulnerable › Vulnerabilities

CVE-2017-7184

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-03-19 · updated 2026-06-17

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.

Affected products

• Linux kernel: before 3.2.89; from 3.3 before 3.10.106; from 3.11 before 3.12.73; from 3.13 before 3.16.44; from 3.17 before 3.18.49; from 3.19 before 4.1.49 — fixed in 3.10.106, 3.12.73, 3.16.44, 3.18.49, 3.2.89, 4.1.49

How to fix

Upgrade to a fixed version: Linux kernel 3.10.106, 3.12.73, 3.16.44, 3.18.49. Check the vendor advisory for mitigations.

References

• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=677e806da4d916052585301785d847c3b3e6186a
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f843ee6dd019bcece3e74e76ad9df0155655d0df
• http://openwall.com/lists/oss-security/2017/03/29/2
• http://www.eweek.com/security/ubuntu-linux-falls-on-day-1-of-pwn2own-hacking-competition
• http://www.securityfocus.com/bid/97018
• http://www.securitytracker.com/id/1038166
• https://access.redhat.com/errata/RHSA-2017:2918
• https://access.redhat.com/errata/RHSA-2017:2930
• https://access.redhat.com/errata/RHSA-2017:2931
• https://access.redhat.com/errata/RHSA-2019:4159
• https://blog.trendmicro.com/results-pwn2own-2017-day-one/
• https://github.com/torvalds/linux/commit/677e806da4d916052585301785d847c3b3e6186a

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