CVE-2017-7518 (GCVE-0-2017-7518)

Vulnerability from cvelistv5 – Published: 2018-07-30 13:00 – Updated: 2024-08-05 16:04
VLAI
Summary
A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flag(TF) bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exception(#DB) being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges inside the guest. Linux guests are not affected by this.
Severity
5.5 (Medium)
CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CWE
Assigner
redhat CNA under the redhat root
CNA scorecard B 82/100 over 1085 records in the last 180 days details
References
URL Tags
https://access.redhat.com/errata/RHSA-2018:0412 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/articles/3290921 x_refsource_CONFIRM
https://usn.ubuntu.com/3619-2/ vendor-advisoryx_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2018:0395 vendor-advisoryx_refsource_REDHAT
https://usn.ubuntu.com/3754-1/ vendor-advisoryx_refsource_UBUNTU
http://www.securitytracker.com/id/1038782 vdb-entryx_refsource_SECTRACK
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2017/06/23/5 mailing-listx_refsource_MLIST
https://usn.ubuntu.com/3619-1/ vendor-advisoryx_refsource_UBUNTU
https://www.debian.org/security/2017/dsa-3981 vendor-advisoryx_refsource_DEBIAN
https://www.spinics.net/lists/kvm/msg151817.html mailing-listx_refsource_MLIST
http://www.securityfocus.com/bid/99263 vdb-entryx_refsource_BID
Impacted products
Vendor Product Version CPE status
[UNKNOWN] Kernel: Affected: 4.12
guessed Create a notification for this product.
Date Public
2017-06-22 00:00
Show details on NVD website
To clipboard 

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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
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Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

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