CVE-2017-1000405: Race Condition
First published: Wed Nov 22 2017(Updated: )
A flaw was found in the patches used to fix the 'dirtycow' vulnerability <a href="https://access.redhat.com/security/cve/CVE-2016-5195">CVE-2016-5195</a>). The touch_pmd() function can be accessed by get_user_pages(). In this case, the pmd will become dirty without going through the Copy On Write cycle. In the simplest example, a large page that is read-only can be modified, including page 0 of a processes virtual address space. Upstream patch: <a href="https://github.com/torvalds/linux/commit/a8f97366452ed491d13cf1e44241bc0b5740b1f0">https://github.com/torvalds/linux/commit/a8f97366452ed491d13cf1e44241bc0b5740b1f0</a> Vulnerability announcement: <a href="http://www.openwall.com/lists/oss-security/2017/11/30/1">http://www.openwall.com/lists/oss-security/2017/11/30/1</a>
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=3.2.87<3.3 | |
| Linux Kernel | >=3.10.106<3.11 | |
| Linux Kernel | >=3.12.73<3.13 | |
| Linux Kernel | >=3.16.42<3.16.52 | |
| Linux Kernel | >=3.18.55<3.18.86 | |
| Linux Kernel | >=4.1.41<4.1.48 | |
| Linux Kernel | >=4.4.70<4.4.104 | |
| Linux Kernel | >=4.9.7<4.9.67 | |
| Linux Kernel | >=4.10<4.14.4 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.17-1 |
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Reference Links
- http://www.securityfocus.com/bid/102032
- http://www.securitytracker.com/id/1040020
- https://access.redhat.com/errata/RHSA-2018:0180
- https://medium.com/bindecy/huge-dirty-cow-cve-2017-1000405-110eca132de0
- https://source.android.com/security/bulletin/pixel/2018-02-01
- https://www.exploit-db.com/exploits/43199/
- https://launchpad.net/bugs/cve/CVE-2017-1000405
- https://access.redhat.com/security/cve/CVE-2016-5195
- https://github.com/torvalds/linux/commit/a8f97366452ed491d13cf1e44241bc0b5740b1f0
- http://www.openwall.com/lists/oss-security/2017/11/30/1
- https://access.redhat.com/security/vulnerabilities/3253921
- https://access.redhat.com/articles/3158541
- https://access.redhat.com/articles/3158511
- https://access.redhat.com/solutions/1320153
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1519115
- https://bugzilla.redhat.com/show_bug.cgi?id=1516514
- https://git.kernel.org/linus/a8f97366452ed491d13cf1e44241bc0b5740b1f0
- https://www.openwall.com/lists/oss-security/2017/11/30/1
- https://github.com/bindecy/HugeDirtyCowPOC
- https://security-tracker.debian.org/tracker/CVE-2017-1000405
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-1000405
- https://nvd.nist.gov/vuln/detail/CVE-2017-1000405
- https://ubuntu.com/security/CVE-2017-1000405
Frequently Asked Questions
What is the severity of CVE-2017-1000405?
CVE-2017-1000405 has been classified as a moderate severity vulnerability due to its potential impact on Linux Kernel security.
How do I fix CVE-2017-1000405?
To fix CVE-2017-1000405, update your Linux Kernel to a version that includes the security patches addressing this vulnerability.
What types of systems are affected by CVE-2017-1000405?
CVE-2017-1000405 affects various versions of the Linux Kernel, specifically those between 3.2.87 and 4.14.4.
Is CVE-2017-1000405 related to CVE-2016-5195?
Yes, CVE-2017-1000405 is a flaw found in the patches that were implemented to fix the earlier CVE-2016-5195 'dirtycow' vulnerability.
What is the potential impact of CVE-2017-1000405?
The potential impact of CVE-2017-1000405 includes unauthorized access to system resources and possible data breaches.
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