Will Estes and John Millaway flex 2.5.30/2.5.32 memory corruption
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
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6.6 | $0-$5k | 0.00 |
A vulnerability was found in Will Estes and John Millaway flex 2.5.30/2.5.32 and classified as critical. This issue affects some unknown processing. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:
flex.skl in Will Estes and John Millaway Fast Lexical Analyzer Generator (flex) before 2.5.33 does not allocate enough memory for grammars containing (1) REJECT statements or (2) trailing context rules, which causes flex to generate code that contains a buffer overflow that might allow context-dependent attackers to execute arbitrary code.
The bug was discovered 03/01/2006. The weakness was shared 02/22/2006 (Website). It is possible to read the advisory at archives.neohapsis.com. The identification of this vulnerability is CVE-2006-0459 since 01/27/2006. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.
It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 21045 (GLSA-200603-07 : flex: Potential insecure code generation), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l.
Upgrading to version 2.5.33 eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.
The vulnerability is also documented in the databases at X-Force (24995) and Tenable (21045). The entries VDB-42810, VDB-49579, VDB-51844 and VDB-74661 are related to this item.
Product
Vendor
Name
Version
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
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CVSSv3
VulDB Meta Base Score: 7.3VulDB Meta Temp Score: 6.6
VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
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Exploiting
Class: Memory corruptionCWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Yes
Availability: 🔍
Status: Proof-of-Concept
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Nessus ID: 21045
Nessus Name: GLSA-200603-07 : flex: Potential insecure code generation
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍
OpenVAS ID: 56472
OpenVAS Name: Debian Security Advisory DSA 1020-1 (flex)
OpenVAS File: 🔍
OpenVAS Family: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Upgrade: flex 2.5.33
Timeline
01/27/2006 🔍02/22/2006 🔍
02/23/2006 🔍
03/01/2006 🔍
03/01/2006 🔍
03/01/2006 🔍
03/10/2006 🔍
03/13/2006 🔍
03/21/2006 🔍
03/29/2006 🔍
03/12/2015 🔍
06/15/2019 🔍
Sources
Advisory: archives.neohapsis.comStatus: Not defined
Confirmation: 🔍
CVE: CVE-2006-0459 (🔍)
X-Force: 24995
Vulnerability Center: 10716 - Flex Buffer Overflow Allows Remote Code Execution, Medium
SecurityFocus: 16896 - Flex Code Generation Buffer Overflow Vulnerability
Secunia: 19071
OSVDB: 23440 - Fast Lexical Analyzer Generator (Flex) Multiple Lexicographical Scanners Overflow
Vupen: ADV-2006-0770
See also: 🔍
Entry
Created: 03/12/2015 12:19Updated: 06/15/2019 17:27
Changes: 03/12/2015 12:19 (75), 06/15/2019 17:27 (5)
Complete: 🔍
Cache ID: 3:0EA:103
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