lighttpd 1.4.35 Log File http_auth.c injection

CVSS Meta Temp Score
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CTI Interest Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in lighttpd 1.4.35. The impacted element is an unknown function of the file http_auth.c of the component Log File Handler. Such manipulation leads to injection. This vulnerability is documented as CVE-2015-3200. The attack can be executed remotely. Additionally, an exploit exists. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability, which was classified as critical, has been found in lighttpd 1.4.35 (Web Server). Affected by this issue is an unknown functionality of the file http_auth.c of the component Log File Handler. The manipulation with an unknown input leads to a injection vulnerability. Using CWE to declare the problem leads to CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. Impacted is confidentiality, and integrity. CVE summarizes:

mod_auth in lighttpd before 1.4.36 allows remote attackers to inject arbitrary log entries via a basic HTTP authentication string without a colon character, as demonstrated by a string containing a NULL and new line character.

The weakness was released 05/25/2015 by JaanusKp as confirmed advisory (Blog). The advisory is available at jaanuskp.blogspot.com. This vulnerability is handled as CVE-2015-3200 since 04/10/2015. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known. This vulnerability is assigned to T1055 by the MITRE ATT&CK project. The advisory points out:

When basic HTTP authentication base64 string does not contain colon character (or contains it after NULL byte - can be inserted inside base64 encoding), then that situation is logged with a string ": is missing in " and the simply decoded base64 string. This means that new lines, NULL byte and everything else can be encoded with base64 and are then inserted to logs as they are after decoding.

A public exploit has been developed by JaanusKp in HTTP GET Request and been published immediately after the advisory. The exploit is available at jaanuskp.blogspot.ch. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 85289 (Fedora 21 : lighttpd-1.4.36-1.fc21 (2015-12250)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 87358 (lighttpd Input Validation Flaw Log File Entry Injection Vulnerability).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at redmine.lighttpd.net. A possible mitigation has been published 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (85289), SecurityFocus (BID 74813†) and SecurityTracker (ID 1032405†). Entry connected to this vulnerability is available at VDB-75579. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.1

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Injection
CWE: CWE-74 / CWE-707 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: JaanusKp
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 85289
Nessus Name: Fedora 21 : lighttpd-1.4.36-1.fc21 (2015-12250)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802044
OpenVAS Name: Lighttpd http_auth.c Remote Code Execution Vulnerability - June15 (Windows)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍

Patch: redmine.lighttpd.net

Timelineinfo

04/10/2015 🔍
05/25/2015 +45 days 🔍
05/25/2015 +0 days 🔍
05/25/2015 +0 days 🔍
05/26/2015 +1 days 🔍
05/27/2015 +1 days 🔍
06/09/2015 +13 days 🔍
07/29/2015 +50 days 🔍
08/10/2015 +12 days 🔍
05/19/2022 +2474 days 🔍

Sourcesinfo

Advisory: 2646
Researcher: JaanusKp
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-3200 (🔍)
GCVE (CVE): GCVE-0-2015-3200
GCVE (VulDB): GCVE-100-75566
SecurityFocus: 74813 - Lighttpd 'http_auth.c' Security Bypass Vulnerability
SecurityTracker: 1032405

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 05/27/2015 10:38
Updated: 05/19/2022 12:32
Changes: 05/27/2015 10:38 (82), 04/01/2019 16:51 (12), 05/19/2022 12:32 (4)
Complete: 🔍
Cache ID: 216:600:103

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