GNU lsh Daemon 1.4 client_keyexchange.c 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, which was classified as critical, has been found in GNU lsh Daemon 1.4. Impacted is an unknown function of the file read_line.c/channel_commands.c/client_keyexchange.c. The manipulation leads to heap-based overflow. This vulnerability is documented as CVE-2003-0826. Additionally, an exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in GNU lsh Daemon 1.4. It has been rated as critical. This issue affects an unknown functionality of the file read_line.c/channel_commands.c/client_keyexchange.c. 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:

lsh daemon (lshd) does not properly return from certain functions in (1) read_line.c, (2) channel_commands.c, or (3) client_keyexchange.c when long input is provided, which could allow remote attackers to execute arbitrary code via a heap-based buffer overflow attack.

The weakness was released 10/06/2003 by Carl Livitt as not defined posting (Bugtraq). The advisory is shared at marc.theaimsgroup.com. The identification of this vulnerability is CVE-2003-0826 since 09/19/2003. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known.

A public exploit has been developed in ANSI C. The exploit is available at securityfocus.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 18153 (Debian DSA-717-1 : lsh-utils - buffer overflow, typo), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 38243 (LSH Remote Buffer Overflow Vulnerability).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 years after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 2372.

The vulnerability is also documented in the databases at X-Force (13245), Exploit-DB (23161), Tenable (18153), SecurityFocus (BID 8655†) and Vulnerability Center (SBV-2180†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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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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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: 🔍
Access: Public
Status: Proof-of-Concept
Programming Language: 🔍
Download: 🔍

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Nessus ID: 18153
Nessus Name: Debian DSA-717-1 : lsh-utils - buffer overflow, typo
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 53544
OpenVAS Name: Debian Security Advisory DSA 717-1 (lsh-utils)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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TippingPoint: 🔍

Timelineinfo

09/19/2003 🔍
09/19/2003 +0 days 🔍
09/19/2003 +0 days 🔍
09/24/2003 +5 days 🔍
10/06/2003 +12 days 🔍
10/06/2003 +0 days 🔍
04/27/2005 +569 days 🔍
04/28/2005 +1 days 🔍
08/14/2014 +3395 days 🔍
07/21/2025 +3994 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: marc.theaimsgroup.com
Researcher: Carl Livitt
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2003-0826 (🔍)
GCVE (CVE): GCVE-0-2003-0826
GCVE (VulDB): GCVE-100-20861
X-Force: 13245
SecurityFocus: 8655 - LSH Remote Buffer Overflow Vulnerability
Vulnerability Center: 2180 - Buffer Overflow in LSH Daemon Enables Arbitrary Code Execution, Critical

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/15/2014 01:08
Updated: 07/21/2025 04:23
Changes: 08/15/2014 01:08 (73), 05/13/2019 11:00 (8), 12/02/2024 23:18 (19), 07/21/2025 04:23 (2)
Complete: 🔍
Cache ID: 216::103

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