CVE-2017-5551

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Summary

CVECVE-2017-5551
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2017-02-06 06:59:00 UTC
Updated2019-10-03 00:03:00 UTC
DescriptionThe simple_set_acl function in fs/posix_acl.c in the Linux kernel before 4.9.6 preserves the setgid bit during a setxattr call involving a tmpfs filesystem, which allows local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-7097.

Risk And Classification

Problem Types: NVD-CWE-noinfo

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

References

ReferenceSourceLinkTags
tmpfs: clear S_ISGID when setting posix ACLs · torvalds/linux@497de07 · GitHub CONFIRM github.com Issue Tracking, Patch, Third Party Advisory
www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.6 CONFIRM www.kernel.org Release Notes, Vendor Advisory
kernel/git/torvalds/linux.git - Linux kernel source tree CONFIRM git.kernel.org Issue Tracking, Patch, Third Party Advisory
Linux Kernel 'tmpfs' File System Permission Flaw Lets Local Users Gain Elevated Privileges - SecurityTracker SECTRACK www.securitytracker.com
oss-security - Re: CVE REQUEST: linux kernel: process with pgid zero able to crash kernel MLIST www.openwall.com Mailing List, Patch, Third Party Advisory
Bug 1416126 – CVE-2017-5551 kernel: S_ISGD is not cleared when setting posix ACLs in tmpfs (CVE-2016-7097 incomplete fix) CONFIRM bugzilla.redhat.com Issue Tracking, Patch
Debian -- Security Information -- DSA-3791-1 linux DEBIAN www.debian.org
Linux Kernel CVE-2017-5551 Local Denial of Service Vulnerability BID www.securityfocus.com Third Party Advisory, VDB Entry
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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