CVE-2015-3339: Race Condition
First published: Tue Apr 21 2015(Updated: )
A race condition flaw was found between the chown() and execve() system calls. When changing the owner of a setuid-user binary to root, the race condition could momentarily make the binary setuid root. When root chown()ed an attacker-owned setuid file to root, the file briefly was setuid root (and executable as such). An attacker could take advantage of this small window and execute a setuid binary with elevated privileges. Upstream patch: <a href="https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8b01fc86b9f425899f8a3a8fc1c47d73c2c20543">https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8b01fc86b9f425899f8a3a8fc1c47d73c2c20543</a> Additional details: <a href="http://seclists.org/oss-sec/2015/q2/216">http://seclists.org/oss-sec/2015/q2/216</a>
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <=3.19.5 | |
| Debian Linux | =7.0 | |
| Debian Linux | =8.0 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.133-1 6.12.22-1 |
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Reference Links
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8b01fc86b9f425899f8a3a8fc1c47d73c2c20543
- http://lists.fedoraproject.org/pipermail/package-announce/2015-May/157897.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158804.html
- http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00011.html
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00007.html
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00008.html
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00009.html
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00011.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html
- http://rhn.redhat.com/errata/RHSA-2015-1272.html
- http://www.debian.org/security/2015/dsa-3237
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.19.6
- http://www.openwall.com/lists/oss-security/2015/04/20/5
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- http://www.securitytracker.com/id/1032412
- https://bugzilla.redhat.com/show_bug.cgi?id=1214030
- https://github.com/torvalds/linux/commit/8b01fc86b9f425899f8a3a8fc1c47d73c2c20543
- https://launchpad.net/bugs/cve/CVE-2015-3339
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8b01fc86b9f425899f8a3a8fc1c47d73c2c20543
- http://seclists.org/oss-sec/2015/q2/216
- https://access.redhat.com/support/policy/updates/errata/
- https://rhn.redhat.com/errata/RHSA-2015-1272.html
- https://rhn.redhat.com/errata/RHSA-2015-2411.html
- https://rhn.redhat.com/errata/RHSA-2015-2152.html
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8b01fc86b9f425899f8a3a8fc1c47d73c2c20543
- https://www.openwall.com/lists/oss-security/2015/04/20/1
- https://security-tracker.debian.org/tracker/CVE-2015-3339
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3339
- https://nvd.nist.gov/vuln/detail/CVE-2015-3339
- https://ubuntu.com/security/CVE-2015-3339
Frequently Asked Questions
What is the severity of CVE-2015-3339?
CVE-2015-3339 has a medium severity rating due to the potential for privilege escalation.
How do I fix CVE-2015-3339?
To fix CVE-2015-3339, ensure you update to the patched versions of the Linux kernel or Debian packages that address this vulnerability.
What systems are affected by CVE-2015-3339?
CVE-2015-3339 affects multiple versions of the Linux kernel up to 3.19.5 and both Debian 7.0 and 8.0 distributions.
How does CVE-2015-3339 work?
CVE-2015-3339 exploits a race condition between the chown() and execve() system calls, allowing unauthorized users to gain root privileges.
Is there a known exploit for CVE-2015-3339?
Yes, there are known exploits for CVE-2015-3339 that can allow an attacker to exploit privilege escalation opportunities in affected systems.
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