VDB-51844 · CVE-2010-0634 · OSVDB 62029

Will Estes flex up to 2.5.34 Remote Code Execution

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.
7.0	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Will Estes flex 2.5.4a/2.5.27/2.5.31/2.5.33/2.5.34. Affected by this issue is some unknown functionality. Executing a manipulation can lead to Remote Code Execution. The identification of this vulnerability is CVE-2010-0634. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in Will Estes flex 2.5.4a/2.5.27/2.5.31/2.5.33/2.5.34 and classified as critical. This vulnerability affects some unknown functionality. The manipulation with an unknown input leads to a remote code execution vulnerability. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Unspecified vulnerability in Fast Lexical Analyzer Generator (flex) before 2.5.35 has unknown impact and attack vectors.

The weakness was shared 01/29/2010 (Website). The advisory is shared for download at freshmeat.net. This vulnerability was named CVE-2010-0634 since 02/12/2010. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version 2.5.34 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at OSVDB (62029†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Will Estes

Name

flex

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

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: Remote Code Execution
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: flex 2.5.34

Timelineinfo

01/29/2010 🔍
01/29/2010 +0 days 🔍
01/31/2010 +2 days 🔍
02/12/2010 +11 days 🔍
02/12/2010 +0 days 🔍
03/18/2015 +1860 days 🔍
04/30/2026 +4061 days 🔍

Sourcesinfo

Advisory: freshmeat.net
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2010-0634 (🔍)
GCVE (CVE): GCVE-0-2010-0634
GCVE (VulDB): GCVE-100-51844
OSVDB: 62029 - Fast Lexical Analyzer Generator (Flex) Unspecified Issue

Entryinfo

Created: 03/18/2015 15:15
Updated: 04/30/2026 22:26
Changes: 03/18/2015 15:15 (48), 01/27/2019 16:51 (2), 04/30/2026 22:26 (19)
Complete: 🔍
Cache ID: 216::103