CVE-2015-4021

Enterprise Linux Desktop vulnerability

CVSS

5.0

EPSS

21.4%

EPSS pct

97th

Exploited

No known

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 vendor

Redhat

Affected product

Enterprise Linux Desktop

CVSS vector

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

Weakness type (CWE)

CWE-189

Published

2015-06-09

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to availability.

Its EPSS score of 21.4% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2015-4021

Confirm whether Redhat Enterprise Linux Desktop is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2015-4021.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2015-4021

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