Vulnerability Description
The phar_parse_tarfile function in ext/phar/tar.c in PHP before 5.4.41, 5.5.x before 5.5.25, and 5.6.x before 5.6.9 does not verify that the first character of a filename is different from the \0 character, which allows remote attackers to cause a denial of service (integer underflow and memory corruption) via a crafted entry in a tar archive.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Enterprise Linux Desktop | 7.0 |
| Redhat | Enterprise Linux Hpc Node | 7.0 |
| Redhat | Enterprise Linux Hpc Node Eus | 7.1 |
| Redhat | Enterprise Linux Server | 7.0 |
| Redhat | Enterprise Linux Server Eus | 7.1 |
| Redhat | Enterprise Linux Workstation | 7.0 |
| Apple | Mac Os X | <= 10.10.4 |
| Redhat | Enterprise Linux | 6.0 |
| Php | Php | <= 5.4.40 |
Related Weaknesses (CWE)
References
- http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158616.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158915.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-May/159031.html
- http://lists.opensuse.org/opensuse-updates/2015-06/msg00002.html
- http://php.net/ChangeLog-5.phpPatch
- http://rhn.redhat.com/errata/RHSA-2015-1135.html
- http://rhn.redhat.com/errata/RHSA-2015-1186.html
- http://rhn.redhat.com/errata/RHSA-2015-1187.html
- http://rhn.redhat.com/errata/RHSA-2015-1218.html
- http://rhn.redhat.com/errata/RHSA-2015-1219.html
- http://www.debian.org/security/2015/dsa-3280
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.h
- http://www.securityfocus.com/bid/74700
- http://www.securitytracker.com/id/1032433
FAQ
What is CVE-2015-4021?
CVE-2015-4021 is a vulnerability with a CVSS score of 5.0 (MEDIUM). The phar_parse_tarfile function in ext/phar/tar.c in PHP before 5.4.41, 5.5.x before 5.5.25, and 5.6.x before 5.6.9 does not verify that the first character of a filename is different from the \0 char...
How severe is CVE-2015-4021?
CVE-2015-4021 has been rated MEDIUM with a CVSS base score of 5.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2015-4021?
Check the references section above for vendor advisories and patch information. Affected products include: Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Hpc Node, Redhat Enterprise Linux Hpc Node Eus, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Eus.