CVE-2017-7487: Use After Free
First published: Wed May 03 2017(Updated: )
A reference counter leak in ipxitf_ioctl function was found which results into use after free vulnerability that's triggerable from unprivileged userspace when IPX interface is configured. References: <a href="http://seclists.org/oss-sec/2017/q2/251">http://seclists.org/oss-sec/2017/q2/251</a> <a href="https://patchwork.ozlabs.org/patch/757549/">https://patchwork.ozlabs.org/patch/757549/</a> Upstream patch: <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ee0d8d8482345ff97a75a7d747efc309f13b0d80">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ee0d8d8482345ff97a75a7d747efc309f13b0d80</a>
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <3.2.89 | |
| Linux Linux kernel | >=3.3<3.16.44 | |
| Linux Linux kernel | >=3.17<3.18.55 | |
| Linux Linux kernel | >=3.19<4.1.41 | |
| Linux Linux kernel | >=4.2<4.4.70 | |
| Linux Linux kernel | >=4.5<4.9.30 | |
| Linux Linux kernel | >=4.10<4.11.3 | |
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Google Android | ||
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.5-1 6.11.7-1 |
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Reference Links
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ee0d8d8482345ff97a75a7d747efc309f13b0d80
- http://www.debian.org/security/2017/dsa-3886
- http://www.securityfocus.com/bid/98439
- http://www.securitytracker.com/id/1039237
- https://bugzilla.redhat.com/show_bug.cgi?id=1447734
- https://github.com/torvalds/linux/commit/ee0d8d8482345ff97a75a7d747efc309f13b0d80
- https://patchwork.ozlabs.org/patch/757549/
- https://source.android.com/security/bulletin/2017-09-01
- https://launchpad.net/bugs/cve/CVE-2017-7487
- http://seclists.org/oss-sec/2017/q2/251
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ee0d8d8482345ff97a75a7d747efc309f13b0d80
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1450417
- https://source.android.com/docs/security/bulletin/2017-09-01 (Advisory)
- https://git.kernel.org/linus/ee0d8d8482345ff97a75a7d747efc309f13b0d80
- https://security-tracker.debian.org/tracker/CVE-2017-7487
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7487
- https://nvd.nist.gov/vuln/detail/CVE-2017-7487
- https://ubuntu.com/security/CVE-2017-7487
Frequently Asked Questions
What is the vulnerability ID for this security issue?
The vulnerability ID is CVE-2017-7487.
What is the severity level of CVE-2017-7487?
The severity level of CVE-2017-7487 is high.
How does CVE-2017-7487 affect Linux kernel?
CVE-2017-7487 allows local users to cause a denial of service (use-after-free) or possibly have other unspecified impact by exploiting mishandled reference counts in the ipxitf_ioctl function in net/ipx/af_ipx.c.
Which versions of Linux kernel are affected by CVE-2017-7487?
Linux kernel versions through 4.11.1 are affected by CVE-2017-7487.
Where can I find more information about CVE-2017-7487?
You can find more information about CVE-2017-7487 at the following references: http://www.securitytracker.com/id/1039237, http://www.securityfocus.com/bid/98439, http://www.debian.org/security/2017/dsa-3886.
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