UBUNTU-CVE-2017-1000255

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Source
https://ubuntu.com/security/CVE-2017-1000255
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-1000255.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2017-1000255
Upstream
Downstream
Related
Published
2017-10-09T00:00:00Z
Modified
2026-01-30T02:35:51Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - high
Summary
[none]
Details

On Linux running on PowerPC hardware (Power8 or later) a user process can craft a signal frame and then do a sigreturn so that the kernel will take an exception (interrupt), and use the r1 value from the signal frame as the kernel stack pointer. As part of the exception entry the content of the signal frame is written to the kernel stack, allowing an attacker to overwrite arbitrary locations with arbitrary values. The exception handling does produce an oops, and a panic if panic_on_oops=1, but only after kernel memory has been over written. This flaw was introduced in commit: "5d176f751ee3 (powerpc: tm: Enable transactional memory (TM) lazily for userspace)" which was merged upstream into v4.9-rc1. Please note that kernels built with CONFIG_PPC_TRANSACTIONAL_MEM=n are not vulnerable.

References

Affected packages

Ubuntu:16.04:LTS / linux-hwe

Package

Name
linux-hwe
Purl
pkg:deb/ubuntu/linux-hwe@4.10.0-37.41~16.04.1?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.10.0-37.41~16.04.1

Affected versions

4.*
4.8.0-36.36~16.04.1
4.8.0-39.42~16.04.1
4.8.0-41.44~16.04.1
4.8.0-42.45~16.04.1
4.8.0-44.47~16.04.1
4.8.0-45.48~16.04.1
4.8.0-46.49~16.04.1
4.8.0-49.52~16.04.1
4.8.0-51.54~16.04.1
4.8.0-52.55~16.04.1
4.8.0-53.56~16.04.1
4.8.0-54.57~16.04.1
4.8.0-56.61~16.04.1
4.8.0-58.63~16.04.1
4.10.0-27.30~16.04.2
4.10.0-28.32~16.04.2
4.10.0-30.34~16.04.1
4.10.0-32.36~16.04.1
4.10.0-33.37~16.04.1
4.10.0-35.39~16.04.1

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Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-1000255.json"