CVE-2015-8709
First published: Mon Jan 04 2016(Updated: )
** DISPUTED ** kernel/ptrace.c in the Linux kernel through 4.4.1 mishandles uid and gid mappings, which allows local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states "there is no kernel bug here."
Credit: security@debian.org security@debian.org security@debian.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <=4.4.1 | |
| debian/linux | 5.10.223-1 6.1.106-3 6.1.99-1 6.10.9-1 |
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Reference Links
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176484.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00015.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00019.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00025.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00026.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00027.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00028.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00029.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00030.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00031.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00032.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00033.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00034.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00036.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00037.html
- http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00005.html
- http://marc.info/?l=linux-kernel&m=145204362722256&w=2
- http://marc.info/?l=linux-kernel&m=145204641422813&w=2
- http://www.debian.org/security/2016/dsa-3434
- http://www.openwall.com/lists/oss-security/2015/12/17/12
- http://www.openwall.com/lists/oss-security/2015/12/31/5
- http://www.securityfocus.com/bid/79899
- http://www.securitytracker.com/id/1034899
- https://bugzilla.redhat.com/show_bug.cgi?id=1295287
- https://lkml.org/lkml/2015/12/25/71
- http://marc.info/?l=linux-kernel&m=145204641422813&w=2
- http://marc.info/?l=linux-kernel&m=145204362722256&w=2
- https://launchpad.net/bugs/cve/CVE-2015-8709
- http://seclists.org/oss-sec/2015/q4/614
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1295288
- https://www.openwall.com/lists/oss-security/2015/12/17/12
- https://lkml.org/lkml/2015/12/12/259
- https://security-tracker.debian.org/tracker/CVE-2015-8709
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8709
- https://nvd.nist.gov/vuln/detail/CVE-2015-8709
- https://ubuntu.com/security/CVE-2015-8709
Frequently Asked Questions
What is the vulnerability ID for this issue?
CVE-2015-8709.
What is the severity level of CVE-2015-8709?
The severity level of CVE-2015-8709 is high.
How does CVE-2015-8709 affect the Linux kernel?
CVE-2015-8709 allows local users to gain privileges by exploiting a mishandling of uid and gid mappings in the Linux kernel.
Which Linux kernel versions are affected by CVE-2015-8709?
Linux kernel versions through 4.4.1 are affected by CVE-2015-8709.
Is there a fix available for CVE-2015-8709?
Yes, the remedy is to upgrade to the specified versions: 3.13.0-103.150, 4.10~, 3.19.0-75.83, 4.2.0-22.27, 4.4.0-51.72, 4.8.0-28.30, and others.
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