Medium 5.0Published Jun 9, 2015

CVE-2015-4021The 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 cha…

Updated under an hour ago (Nov 2, 2026, 1:40 AM ET)

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It affects redhat enterprise_linux_desktop and 8 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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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: 5.0 MEDIUM (v2.0, NVD)AV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness (CWE): CWE-189
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

redhat enterprise_linux_desktop redhat:enterprise_linux_desktop	7.0	NVD
redhat enterprise_linux_hpc_node redhat:enterprise_linux_hpc_node	7.0	NVD
redhat enterprise_linux_hpc_node_eus redhat:enterprise_linux_hpc_node_eus	7.1	NVD
redhat enterprise_linux_server redhat:enterprise_linux_server	7.0	NVD
redhat enterprise_linux_server_eus redhat:enterprise_linux_server_eus	7.1	NVD
redhat enterprise_linux_workstation redhat:enterprise_linux_workstation	7.0	NVD
apple mac_os_x apple:mac_os_x	through 10.10.4	NVD
redhat enterprise_linux redhat:enterprise_linux	6.0; 7.0	NVD
php php php:php	through 5.4.40; 5.4.39; 5.5.0; 5.5.0; 5.5.0; 5.5.0; 5.5.0; 5.5.0; and 44 more ranges	NVD

References

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.php	patch
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
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.