lighttpd up to 1.1.1 http_auth.c base64_decode numeric error

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability, which was classified as problematic, was found in lighttpd up to 1.1.1 (Web Server). This affects the function base64_decode of the file http_auth.c. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-189. This is going to have an impact on availability.

The weakness was shared 12/24/2011 by Xi Wang as Bug 758624 as confirmed bug report (Bugzilla). It is possible to read the advisory at This vulnerability is uniquely identified as CVE-2011-4362 since 11/04/2011. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known.

A public exploit has been developed by pi3 in ANSI C and been published 1 weeks after the advisory. It is declared as proof-of-concept. The exploit is shared for download at The vulnerability scanner Nessus provides a plugin with the ID 74546 (openSUSE Security Update : lighttpd (openSUSE-2012-110)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 120902 (Solaris 11 Support Repository Update (SRU) 6.6 Missing).

Upgrading to version 1.1.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (71536), SecurityTracker (ID 1026359), Vulnerability Center (SBV-34233), Tenable (74546) and Exploit-DB (18295). The entries 4549 and 59848 are related to this item.




CPE 2.3infoedit

CPE 2.2infoedit


VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Denial of service
CWE: CWE-189
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: pi3
Programming Language: 🔍
Download: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 74546
Nessus Name: openSUSE Security Update : lighttpd (openSUSE-2012-110)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 70687
OpenVAS Name: Debian Security Advisory DSA 2368-1 (lighttpd)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfoedit

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Upgrade: lighttpd 1.1.2
ISS Proventia IPS: 🔍


11/04/2011 🔍
11/29/2011 +25 days 🔍
11/30/2011 +1 days 🔍
12/21/2011 +21 days 🔍
12/24/2011 +3 days 🔍
12/24/2011 +0 days 🔍
12/24/2011 +0 days 🔍
12/31/2011 +7 days 🔍
12/31/2011 +0 days 🔍
01/17/2012 +17 days 🔍
06/13/2014 +878 days 🔍
03/23/2015 +283 days 🔍
11/28/2021 +2442 days 🔍


Advisory: Bug 758624
Researcher: Xi Wang
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-4362 (🔍)

X-Force: 71536
SecurityTracker: 1026359 - lighttpd Authentication Decoding Bug Lets Remote Users Deny Service
Vulnerability Center: 34233 - Lighttpd Before 1.4.30 Remote DoS Vulnerability via a Crafted Base64 Input, High
SecurityFocus: 50851 - lighttpd 'http_auth.c' Remote Denial of Service Vulnerability
Secunia: 47260 - Debian update for lighttpd, Moderately Critical
OSVDB: 77366

scip Labs:
See also: 🔍


Created: 03/23/2015 04:50 PM
Updated: 11/28/2021 02:17 PM
Changes: (3) vulnerability_cvss2_nvd_basescore exploit_price_0day source_nessus_risk
Complete: 🔍


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