CVE-2015-5706: Use After Free
First published: Tue Aug 04 2015(Updated: )
A flaw was found in the Linux kernels function path_openat() in which would incorrectly clear up twice (as part of path_lookupat() called by do_tmpfile(). Doing so again can lead to double fput(). This can lead to a use-after free condition. CVE assignment: <a href="http://seclists.org/oss-sec/2015/q3/270">http://seclists.org/oss-sec/2015/q3/270</a> Introduced in this commit: <a href="http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb458c644a59dbba3a1fe59b27106c5e68e1c4bd">http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb458c644a59dbba3a1fe59b27106c5e68e1c4bd</a> Upstream patch: <a href="http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f15133df088ecadd141ea1907f2c96df67c729f0">http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f15133df088ecadd141ea1907f2c96df67c729f0</a> OSS-SEC request: <a href="http://seclists.org/oss-sec/2015/q3/371">http://seclists.org/oss-sec/2015/q3/371</a>
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux kernel | >=3.0<=3.19.8 | |
| Linux kernel | >=4.0<4.0.4 | |
| Ubuntu Linux | =12.04 | |
| Ubuntu Linux | =14.04 | |
| Debian | =7.0 | |
| Debian | =8.0 | |
| Android | ||
| 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://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f15133df088ecadd141ea1907f2c96df67c729f0
- http://twitter.com/grsecurity/statuses/597127122910490624
- http://www.debian.org/security/2015/dsa-3329
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.4
- http://www.openwall.com/lists/oss-security/2015/08/01/5
- http://www.securityfocus.com/bid/76142
- http://www.ubuntu.com/usn/USN-2680-1
- http://www.ubuntu.com/usn/USN-2681-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1250047
- https://github.com/torvalds/linux/commit/f15133df088ecadd141ea1907f2c96df67c729f0
- https://source.android.com/security/bulletin/2017-01-01.html
- https://launchpad.net/bugs/cve/CVE-2015-5706
- http://seclists.org/oss-sec/2015/q3/270
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb458c644a59dbba3a1fe59b27106c5e68e1c4bd
- http://seclists.org/oss-sec/2015/q3/371
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1250048
- https://bugzilla.suse.com/show_bug.cgi?id=940339
- https://source.android.com/docs/security/bulletin/2017-01-01 (Advisory)
- https://www.openwall.com/lists/oss-security/2015/08/01/5
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=60545d0d4610b02e55f65d141c95b18ccf855b6e
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f15133df088ecadd141ea1907f2c96df67c729f0
- https://security-tracker.debian.org/tracker/CVE-2015-5706
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5706
- https://nvd.nist.gov/vuln/detail/CVE-2015-5706
- https://ubuntu.com/security/CVE-2015-5706
Frequently Asked Questions
What is the severity of CVE-2015-5706?
CVE-2015-5706 is classified as a moderate severity vulnerability due to its potential to cause a use-after-free condition.
What systems are affected by CVE-2015-5706?
CVE-2015-5706 affects certain versions of the Linux kernel and specific distributions of Android and Ubuntu.
How can I fix CVE-2015-5706?
To fix CVE-2015-5706, update the Linux kernel to version 5.10.223-1 or later, or apply the relevant patches for affected distributions.
What type of vulnerability is CVE-2015-5706?
CVE-2015-5706 is a use-after-free vulnerability that arises from improper memory management in the Linux kernel.
What impacts could result from exploiting CVE-2015-5706?
Exploiting CVE-2015-5706 could lead to local privilege escalation and potentially allow an attacker to execute arbitrary code.
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