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Vulnerability Details : CVE-2005-1935

Heap-based buffer overflow in the BERDecBitString function in Microsoft ASN.1 library (MSASN1.DLL) allows remote attackers to execute arbitrary code via nested constructed bit strings, which leads to a realloc of a non-null pointer and causes the function to overwrite previously freed memory, as demonstrated using a SPNEGO token with a constructed bit string during HTTP authentication, and a different vulnerability than CVE-2003-0818. NOTE: the researcher has claimed that MS:MS04-007 fixes this issue.
Publish Date : 2005-06-13 Last Update Date : 2008-09-05
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- CVSS Scores & Vulnerability Types

CVSS Score
7.5
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access User
Vulnerability Type(s) Execute CodeOverflow
CWE ID CWE id is not defined for this vulnerability

- Products Affected By CVE-2005-1935

# Product Type Vendor Product Version Update Edition Language
1 OS Microsoft Windows 2000 SP2 Version Details Vulnerabilities
2 OS Microsoft Windows 2000 SP3 Version Details Vulnerabilities
3 OS Microsoft Windows 2000 SP4 FR Version Details Vulnerabilities
4 OS Microsoft Windows 2003 Server R2 Version Details Vulnerabilities
5 OS Microsoft Windows 2003 Server 64-bit Version Details Vulnerabilities
6 OS Microsoft Windows Nt 4.0 SP6 Terminal Server Version Details Vulnerabilities
7 OS Microsoft Windows Nt 4.0 Sp6a Server Version Details Vulnerabilities
8 OS Microsoft Windows Nt 4.0 Sp6a Workstation Version Details Vulnerabilities
9 OS Microsoft Windows Xp SP1 64-bit Version Details Vulnerabilities
10 OS Microsoft Windows Xp SP1 Tablet Pc Version Details Vulnerabilities
11 OS Microsoft Windows Xp 64-bit Version Details Vulnerabilities
12 OS Microsoft Windows Xp Gold Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Microsoft Windows 2000 3
Microsoft Windows 2003 Server 2
Microsoft Windows Nt 3
Microsoft Windows Xp 4

- References For CVE-2005-1935

http://xforce.iss.net/xforce/xfdb/20870
XF asn1-constructed-heap-overflow(20870)
http://www.phreedom.org/solar/exploits/msasn1-bitstring/

- Metasploit Modules Related To CVE-2005-1935

There are not any metasploit modules related to this vulnerability (Please visit www.metasploit.com for more information)


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