vulnwire
7.8high

CVE-2017-18509

An issue was discovered in net/ipv6/ip6mr.c in the Linux kernel before 4.11.

Published 7 y ago · modified 4 mo ago · JSON

CVSS
7.8
v3.1 · NVD
CISA KEV
No
not known exploited
EPSS
0.8%
percentile 58%
Public exploits
0
none known

An issue was discovered in net/ipv6/ip6mr.c in the Linux kernel before 4.11. By setting a specific socket option, an attacker can control a pointer in kernel land and cause an inet_csk_listen_stop general protection fault, or potentially execute arbitrary code under certain circumstances. The issue can be triggered as root (e.g., inside a default LXC container or with the CAP_NET_ADMIN capability) or after namespace unsharing. This occurs because sk_type and protocol are not checked in the appropriate part of the ip6_mroute_* functions. NOTE: this affects Linux distributions that use 4.9.x longterm kernels before 4.9.187.

Exploit prediction (EPSS)

0.84% probability of exploitation in the next 30 days, higher than 58% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.17.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD2.07.2AV:L/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-20 Improper Input Validation
Technology feeds
Linux kernel (RSS, critical only)

References

  • pulsesecurity.co.nz /advisories/linux-kernel-4.9-inetcsklistenstop-gpf · x_refsource_MISC, x_transferred
  • salsa.debian.org /kernel-team/linux/commit/baefcdc2f29923e7325ce4e1a72c3ff0a9800f32 · x_refsource_MISC, x_transferred
  • lists.openwall.net /netdev/2017/12/04/40 · x_refsource_MISC, x_transferred
  • github.com /torvalds/linux/commit/99253eb750fda6a644d5188fb26c43bad8d5a745 · x_refsource_MISC, x_transferred
  • git.kernel.org /cgit/linux/kernel/git/torvalds/linux.git/commit/?id=99253eb750fda6a644d5188fb26c43bad8d5a · x_refsource_MISC, x_transferred
  • debian.org /security/2019/dsa-4497 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • lists.debian.org /debian-lts-announce/2019/08/msg00016.html · mailing-list, x_refsource_MLIST, x_transferred
  • seclists.org /bugtraq/2019/Aug/26 · mailing-list, x_refsource_BUGTRAQ, x_transferred
  • lists.debian.org /debian-lts-announce/2019/08/msg00017.html · mailing-list, x_refsource_MLIST, x_transferred
  • packetstormsecurity.com /files/154059/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html · x_refsource_MISC, x_transferred
  • support.f5.com /csp/article/K41582535 · x_refsource_CONFIRM, x_transferred
  • usn.ubuntu.com /4145-1/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • support.f5.com /csp/article/K41582535?utm_source=f5support&amp%3Butm_medium=RSS · x_refsource_CONFIRM, x_transferred

Sources

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