Tinyproxy 1.3.2/1.3.3/1.4.3 HTTP Proxy double free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability was found in Tinyproxy 1.3.2/1.3.3/1.4.3. It has been classified as critical. Affected by this issue is some unknown functionality of the component HTTP Proxy. Performing a manipulation results in double free. This vulnerability was named CVE-2002-0847. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in Tinyproxy 1.3.2/1.3.3/1.4.3 (Firewall Software). This affects an unknown code block of the component HTTP Proxy. The manipulation with an unknown input leads to a double free vulnerability. CWE is classifying the issue as CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

tinyproxy HTTP proxy 1.5.0, 1.4.3, and earlier allows remote attackers to execute arbitrary code via memory that is freed twice (double-free).

The weakness was presented 08/12/2002 by FIRST (Website). It is possible to read the advisory at marc.info. This vulnerability is uniquely identified as CVE-2002-0847. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 14982 (Debian DSA-145-1 : tinyproxy - doubly freed memory), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 62013 (TinyProxy HTTP Proxy Memory Corruption Vulnerability).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (9079), Tenable (14982), SecurityFocus (BID 4731†) and Vulnerability Center (SBV-4612†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Double free
CWE: CWE-415 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 14982
Nessus Name: Debian DSA-145-1 : tinyproxy - doubly freed memory
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 53726
OpenVAS Name: Debian Security Advisory DSA 145-1 (tinyproxy)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/13/2002 🔍
05/13/2002 +0 days 🔍
08/07/2002 +86 days 🔍
08/12/2002 +5 days 🔍
08/12/2002 +0 days 🔍
06/24/2004 +682 days 🔍
09/29/2004 +97 days 🔍
07/22/2014 +3583 days 🔍
09/13/2025 +4071 days 🔍

Sourcesinfo

Advisory: marc.info
Researcher: FIRST
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2002-0847 (🔍)
GCVE (CVE): GCVE-0-2002-0847
GCVE (VulDB): GCVE-100-18723
X-Force: 9079
SecurityFocus: 4731 - tinyproxy HTTP Proxy Memory Corruption Vulnerability
Vulnerability Center: 4612 - Tinyproxy 1.3.2 - 1.4.3 Allows Code Execution via Doubled-Free Memory, High

Entryinfo

Created: 07/23/2014 00:13
Updated: 09/13/2025 02:34
Changes: 07/23/2014 00:13 (70), 05/22/2019 16:16 (2), 09/13/2025 02:34 (20)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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