CVE-2019-19258

Current Description

In the Linux kernel before 5.4.2, the io_uring feature leads to requests that inadvertently have UID 0 and full capabilities, aka CID-181e448d8709. This is related to fs/io-wq.c, fs/io_uring.c, and net/socket.c. For example, an attacker can bypass intended restrictions on adding an IPv4 address to the loopback interface. This occurs because IORING_OP_SENDMSG operations, although requested in the context of an unprivileged user, are sometimes performed by a kernel worker thread without considering that context.

Basic Data

PublishedDecember 17, 2019
Last ModifiedJanuary 03, 2020
Assignercve@mitre.org
Data TypeCVE
Data FormatMITRE
Data Version4.0
Problem TypeCWE-269
CVE Data Version4.0

Base Metric V2

CVSS 2 - Version2.0
CVSS 2 - Vector StringAV:L/AC:L/Au:N/C:P/I:P/A:P
CVSS 2 - Access VectorLOCAL
CVSS 2 - Access ComplexityLOW
CVSS 2 - AuthenticationNONE
CVSS 2 - Confidentiality ImpactPARTIAL
CVSS 2 - Availability ImpactPARTIAL
CVSS 2 - Base Score4.6
SeverityMEDIUM
Exploitability Score3.9
Impact Score6.4
Obtain All Privilegefalse
Obtain User Privilegefalse
Obtain Other Privilegefalse

Base Metric V3

No data provided.

Configurations

  • OR - Configuration 1
    Cpe VersionPartVendorProductVersionUpdateEditionLanguageSW EditionTarget SWTarget HWOtherVersion Start IncludingVersion End IncludingVersion Start ExcludingVersion End Excluding
    2.3OSLinuxLinux Kernel********5.4.2

Vulnerable Software List

VendorProductVersions
Linux Linux Kernel *

References

NameSourceURLTags
https://bugs.chromium.org/p/project-zero/issues/detail?id=1975https://bugs.chromium.org/p/project-zero/issues/detail?id=1975MISCMailing List Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.2https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.2MISCMailing List Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=181e448d8709e517c9c7b523fcd209f24eb38ca7https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=181e448d8709e517c9c7b5MISCPatch Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d69e07793f891524c6bbf1e75b9ae69db4450953https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d69e07793f891524c6bbf1MISCPatch Vendor Advisory
https://security.netapp.com/advisory/ntap-20200103-0001/https://security.netapp.com/advisory/ntap-20200103-0001/CONFIRM
USN-4284-1https://usn.ubuntu.com/4284-1/UBUNTU