CVE-2017-18017
CRITICAL severity · CVSS 9.8 · Use-after-free
9.8CVSS CRITICAL
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)52%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products we track (4)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2638fd0f92d4397884fd991d8f4925cb3f081901 ↗
Additional information
- NVD record
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2638fd0f92d4397884fd991d8f4925cb3f081901Patch
- http://lists.opensuse.org/opensuse-security-announce/2018-02/msg00008.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2018-02/msg00013.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2018-02/msg00015.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2018-02/msg00038.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2018-02/msg00047.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2018-03/msg00030.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2018-03/msg00067.htmlAdvisory