CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3	$0-$5k	0.00

A vulnerability, which was classified as problematic, has been found in gzip 1.3.5. This issue affects the function huft_build of the file unlzh.c. The manipulation with an unknown input leads to a infinite loop vulnerability. Using CWE to declare the problem leads to CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. Impacted is availability. The summary by CVE is:

unlzh.c in the LHZ component in gzip 1.3.5 allows context-dependent attackers to cause a denial of service (infinite loop) via a crafted GZIP archive.

The weakness was disclosed 09/20/2006 by Tavis Ormandy (Website). The advisory is shared at us-cert.gov. The identification of this vulnerability is CVE-2006-4338. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 22422 (CentOS 3 / 4 : gzip (CESA-2006:0667)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 185008 (HP-UX Update for Software Distributor Package Remote Denial of Service Vulnerability (HPSBUX02195)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 11785.

The vulnerability is also documented in the databases at X-Force (29046) and Tenable (22422). The entries 27241, 31257, 32356 and 32355 are pretty similar.

Productinfo

Name

• gzip

Version

• 1.3.5

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

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

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 22422
Nessus Name: CentOS 3 / 4 : gzip (CESA-2006:0667)
Nessus File: 🔍
Nessus Family: 🔍

OpenVAS ID: 57385
OpenVAS Name: Slackware Advisory SSA:2006-262-01 gzip
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

Timelineinfo

09/19/2006 🔍
09/19/2006 +0 days 🔍
09/19/2006 +0 days 🔍
09/20/2006 +1 days 🔍
09/20/2006 +0 days 🔍
09/25/2006 +4 days 🔍
03/12/2015 +3090 days 🔍
06/08/2017 +819 days 🔍

Sourcesinfo

Advisory: us-cert.gov
Researcher: Tavis Ormandy
Status: Not defined

CVE: CVE-2006-4338 (🔍)
OVAL: 🔍

X-Force: 29046
Vulnerability Center: 12770 - gzip 1.3.5 LHZ Component Remote User-Assisted DoS via a Crafted GZIP Archive, Medium
SecurityFocus: 20101 - GNU GZip Archive Handling Multiple Remote Vulnerabilities
Secunia: 21996
OSVDB: 29008 - gzip unlzh.c huft_build() Function Infinite Loop DoS

See also: 🔍

Entryinfo

Created: 03/12/2015 15:51
Updated: 06/08/2017 23:46
Changes: 03/12/2015 15:51 (66), 06/08/2017 23:46 (10)
Complete: 🔍

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