CVE Tools
Sign in

CVE-2013-4559

Published: Nov 19, 2013Updated: Apr 29, 2026 Sources: CVE List NVDCWE-264
NVD MITRE
7.6CVSSHIGH
EPSS Score
10.7%
Top 4.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:HAu:NC:CI:CA:C
Exploitability
AV:NAccess Vector
Network
AC:HAccess Complexity
High
Au:NAuthentication
None
Impact
C:CConfidentiality
Complete
I:CIntegrity
Complete
A:CAvailability
Complete
Open in CVSS calculator →

Weaknesses

CWE-264

Affected Products

n/an/a
lighttpdlighttpd
On-prem
Networking Infrastructure / load-balancer-proxy
debian linuxdebian
On-premOS
Operating Systems / linux-distro
opensuseopensuse
On-premOS
Operating Systems / linux-distro
lighttpdoss-projectNetworking Infrastructureaka lighttpd
debianoss-projectGBOperating Systemsaka debian gnu/linux
opensuseoss-projectDEOperating Systemsaka opensuse

Exploitability

Official Patch Available

References

http://secunia.com/advisories/55682
secunia.com
http://marc.info/?l=bugtraq&m=141576815022399&w=2
marc.info
http://download.lighttpd.net/lighttpd/security/lighttpd_sa_2013_02.txt
download.lighttpd.net
and 5 more references View all →

Timeline

Published
Nov 19, 2013
Last Updated
Apr 29, 2026

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2013-4559 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows