Executive Summary
| Summary | |
|---|---|
| Title | New flex packages fix insecure code generation |
| Informations | |||
|---|---|---|---|
| Name | DSA-1020 | First vendor Publication | 2006-03-28 |
| Vendor | Debian | Last vendor Modification | 2006-03-28 |
| Severity (Vendor) | N/A | Revision | 1 |
Security-Database Scoring CVSS v3
| Cvss vector : N/A | |||
|---|---|---|---|
| Overall CVSS Score | NA | ||
| Base Score | NA | Environmental Score | NA |
| impact SubScore | NA | Temporal Score | NA |
| Exploitabality Sub Score | NA | ||
| Calculate full CVSS 3.0 Vectors scores | |||
Security-Database Scoring CVSS v2
| Cvss vector : (AV:N/AC:L/Au:N/C:P/I:P/A:P) | |||
|---|---|---|---|
| Cvss Base Score | 7.5 | Attack Range | Network |
| Cvss Impact Score | 6.4 | Attack Complexity | Low |
| Cvss Expoit Score | 10 | Authentication | None Required |
| Calculate full CVSS 2.0 Vectors scores | |||
Detail
| Chris Moore discovered that flex, a scanner generator, generates code, which allocates insufficient memory, if the grammar contains REJECT statements or trailing context rules. This may lead to a buffer overflow and the execution of arbitrary code. If you use code, which is derived from a vulnerable lex grammar in an untrusted environment you need to regenerate your scanner with the fixed version of flex. The old stable distribution (woody) is not affected by this problem. For the stable distribution (sarge) this problem has been fixed in version 2.5.31-31sarge1. For the unstable distribution (sid) this problem has been fixed in version 2.5.33-1. We recommend that you upgrade your flex package. |
Original Source
| Url : http://www.debian.org/security/2006/dsa-1020 |
CWE : Common Weakness Enumeration
| % | Id | Name |
|---|---|---|
| 100 % | CWE-119 | Failure to Constrain Operations within the Bounds of a Memory Buffer |
OpenVAS Exploits
| Date | Description |
|---|---|
| 2008-09-24 | Name : Gentoo Security Advisory GLSA 200603-07 (flex) File : nvt/glsa_200603_07.nasl |
| 2008-01-17 | Name : Debian Security Advisory DSA 1020-1 (flex) File : nvt/deb_1020_1.nasl |
Open Source Vulnerability Database (OSVDB)
| Id | Description |
|---|---|
| 23440 | Fast Lexical Analyzer Generator (Flex) Multiple Lexicographical Scanners Over... Fast Lexical Analyzer Generator (Flex) contains a flaw that may allow arbitrary code execution. The issue is due to a buffer overflow in a particular class of lexicographical scanners generated by flex. It is unclear if there are additional vulnerabilities. |
Nessus® Vulnerability Scanner
| Date | Description |
|---|---|
| 2006-10-14 | Name : The remote Debian host is missing a security-related update. File : debian_DSA-1020.nasl - Type : ACT_GATHER_INFO |
| 2006-03-13 | Name : The remote Gentoo host is missing one or more security-related patches. File : gentoo_GLSA-200603-07.nasl - Type : ACT_GATHER_INFO |
| 2006-03-13 | Name : The remote Ubuntu host is missing one or more security-related patches. File : ubuntu_USN-260-1.nasl - Type : ACT_GATHER_INFO |
Alert History
| Date | Informations |
|---|---|
| 2014-02-17 11:25:37 |
|
