CVE-2013-4559

Lighttpd vulnerability

CVSS

7.6

EPSS

10.7%

EPSS pct

95th

Exploited

No known

lighttpd before 1.4.33 does not check the return value of the (1) setuid, (2) setgid, or (3) setgroups functions, which might cause lighttpd to run as root if it is restarted and allows remote attackers to gain privileges, as demonstrated by multiple calls to the clone function that cause setuid to fail when the user process limit is reached.

Affected vendor

Lighttpd

Affected product

Lighttpd

CVSS vector

AV:N/AC:H/Au:N/C:C/I:C/A:C

Weakness type (CWE)

CWE-264 — Permissions, Privileges, and Access Controls

Published

2013-11-20

Risk analysis

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

Its EPSS score of 10.7% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 95% of all scored CVEs.

Check your external exposure to CVE-2013-4559

Confirm whether Lighttpd Lighttpd is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2013-4559.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2013-4559

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2013-4559 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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