What is the CVSS score of CVE-2015-4021?

CVE-2015-4021 has a CVSS 2.0 base score of 5.0 (Medium). CVSS vector: AV:N/AC:L/Au:N/C:N/I:N/A:P. EPSS exploitation probability: 42.0%.

Is there a public PoC exploit available for CVE-2015-4021?

Yes, a public proof-of-concept exploit is available for CVE-2015-4021. Prioritise patching immediately. EPSS: 42.0%.

Is there a patch available for CVE-2015-4021?

Yes, a patch is available for CVE-2015-4021. Update the affected software to the latest version immediately.

PHP CVE-2015-4021

MEDIUM

Numeric Errors (CWE-189)

2015-06-09 cve@mitre.org

Denial Of Service PHP Buffer Overflow Enterprise Linux Desktop Enterprise Linux Hpc Node Enterprise Linux Hpc Node Eus Enterprise Linux Server Enterprise Linux Server Eus Enterprise Linux Workstation Mac Os X Enterprise Linux

5.0

CVSS 2.0 · NVD

Severity by source

NVD PRIMARY

5.0 MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

AV:N/AC:L/Au:N/C:N/I:N/A:P

Attack Vector

Network

Attack Complexity

Low

Confidentiality

None

Integrity

None

Availability

Lifecycle Timeline

CVE Published

Jun 09, 2015 - 18:59 cve.org

MEDIUM 5.0

DescriptionCVE.org

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.

AnalysisAI

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. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and EPSS exploitation probability 42.0%.

Technical ContextAI

This vulnerability is classified under CWE-189. 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. 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. Version information: before 5.4.41.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.