Netscape Network Security Services Library SSL2 Hello Message heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Netscape Network Security Services Library. It has been classified as critical. Affected by this vulnerability is an unknown functionality of the component SSL2 Hello Message Handler. The manipulation leads to heap-based overflow. This vulnerability is listed as CVE-2004-0826. The attack may be initiated remotely. In addition, an exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Netscape Network Security Services Library (Software Library) (unknown version). This issue affects an unknown code block of the component SSL2 Hello Message Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Heap-based buffer overflow in Netscape Network Security Services (NSS) library allows remote attackers to execute arbitrary code via a modified record length field in an SSLv2 client hello message.

The bug was discovered 06/03/2004. The weakness was presented 08/23/2004 by Mark Dowd with ISS X-Force (Website). It is possible to read the advisory at xforce.iss.net. The identification of this vulnerability is CVE-2004-0826 since 08/27/2004. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but an exploit is available.

After 2 days, there has been an exploit disclosed. The exploit is available at immunitysec.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 81 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 14361 (Netscape NSS Library SSLv2 Challenge Overflow), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gain a shell remotely and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 38330 (Mozilla Network Security Services Library Remote Heap Overflow Vulnerability).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at ftp.mozilla.org. A possible mitigation has been published 4 days after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 2656. In this case the pattern |01| is used for detection. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 2946.

The vulnerability is also documented in the databases at X-Force (16314), Tenable (14361), SecurityFocus (BID 11015†), OSVDB (9116†) and Secunia (SA12362†). ciac.org is providing further details. See VDB-82, VDB-332, VDB-333 and VDB-427 for similar entries. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept
Download: 🔍

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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 14361
Nessus Name: Netscape NSS Library SSLv2 Challenge Overflow
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 52408
OpenVAS Name: FreeBSD Ports: nss
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Exploit Delay Time: 🔍

Patch: ftp.mozilla.org

Snort ID: 2656
Snort Message: WEB-MISC SSLv2 Client_Hello Challenge Length overflow attempt
Snort Class: 🔍
Snort Pattern: 🔍
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

SourceFire IPS: 🔍
ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

06/03/2004 🔍
06/03/2004 +0 days 🔍
08/23/2004 +81 days 🔍
08/23/2004 +0 days 🔍
08/23/2004 +0 days 🔍
08/24/2004 +0 days 🔍
08/24/2004 +0 days 🔍
08/25/2004 +1 days 🔍
08/25/2004 +0 days 🔍
08/27/2004 +2 days 🔍
08/27/2004 +0 days 🔍
08/29/2004 +2 days 🔍
12/31/2004 +124 days 🔍
06/29/2019 +5293 days 🔍

Sourcesinfo

Vendor: netscape.com

Advisory: xforce.iss.net
Researcher: Mark Dowd
Organization: ISS X-Force
Status: Not defined

CVE: CVE-2004-0826 (🔍)
GCVE (CVE): GCVE-0-2004-0826
GCVE (VulDB): GCVE-100-803
X-Force: 16314 - SSLV2 Client Hello Overflow, High Risk
SecurityFocus: 11015 - Mozilla Network Security Services Library Remote Heap Overflow Vulnerability
Secunia: 12362 - NSS Library SSLv2 Connection Negotiation Buffer Overflow Vulnerability, Highly Critical
OSVDB: 9116 - Netscape Network Security Services (NSS) Library SSLv2 Challenge Overflow
Vulnerability Center: 5218 - Mozilla Network Security Services (NSS) Library SSLV2 Heap Overflow, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍
See also: 🔍

Entryinfo

Created: 08/24/2004 17:55
Updated: 06/29/2019 09:26
Changes: 08/24/2004 17:55 (113), 06/29/2019 09:26 (3)
Complete: 🔍
Cache ID: 216:1D9:103

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