silc SILC Client up to 1.1.2 silcpkcs1.c silc_pkcs1_decode numeric error

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 silc SILC Client up to 1.1.2. It has been rated as critical. Affected is the function silc_pkcs1_decode of the file silcpkcs1.c. This manipulation causes numeric error. This vulnerability is registered as CVE-2008-1552. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in silc SILC Client up to 1.1.2 and classified as critical. Affected by this vulnerability is the function silc_pkcs1_decode of the file silcpkcs1.c. The manipulation with an unknown input leads to a numeric error vulnerability. The CWE definition for the vulnerability is CWE-189. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The silc_pkcs1_decode function in the silccrypt library (silcpkcs1.c) in Secure Internet Live Conferencing (SILC) Toolkit before 1.1.7, SILC Client before 1.1.4, and SILC Server before 1.1.2 allows remote attackers to execute arbitrary code via a crafted PKCS#1 message, which triggers an integer underflow, signedness error, and a buffer overflow. NOTE: the researcher describes this as an integer overflow, but CVE uses the "underflow" term in cases of wraparound from unsigned subtraction.

The bug was discovered 03/25/2008. The weakness was published 03/31/2008 (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is known as CVE-2008-1552 since 03/31/2008. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 31669 (Fedora 8 : libsilc-1.0.2-6.fc8 (2008-2641)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165710 (SUSE Enterprise Linux Security Update (SUSE-SR:2008:008)).

Upgrading to version 1.1.3 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (41474), Tenable (31669), SecurityFocus (BID 28373†), OSVDB (43762†) and Secunia (SA29463†). Similar entries are available at VDB-36018, VDB-41234, VDB-40632 and VDB-41796. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

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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NVD Base Score: 🔍

Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 31669
Nessus Name: Fedora 8 : libsilc-1.0.2-6.fc8 (2008-2641)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 60631
OpenVAS Name: FreeBSD Ports: silc-irssi-client, silc-client
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: SILC Client 1.1.3

Timelineinfo

03/21/2008 🔍
03/25/2008 +4 days 🔍
03/25/2008 +0 days 🔍
03/25/2008 +0 days 🔍
03/26/2008 +1 days 🔍
03/26/2008 +0 days 🔍
03/31/2008 +5 days 🔍
03/31/2008 +0 days 🔍
03/31/2008 +0 days 🔍
04/01/2008 +1 days 🔍
03/16/2015 +2540 days 🔍
08/07/2019 +1605 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2008-1552 (🔍)
GCVE (CVE): GCVE-0-2008-1552
GCVE (VulDB): GCVE-100-41755
X-Force: 41474
SecurityFocus: 28373 - SILC Client and Server Key Negotiation Protocol Remote Buffer Overflow Vulnerability
Secunia: 29463
OSVDB: 43762 - SILC - Client and Server - Key Negotiation Protocol Remote Buffer Overflow Issue
SecurityTracker: 1019690
Vulnerability Center: 18066 - SILC Toolkit < 1.1.7, SILC Client < 1.1.4 and SILC Server < 1.1.2 Remote Code Execution, High
Vupen: ADV-2008-0974

See also: 🔍

Entryinfo

Created: 03/16/2015 17:00
Updated: 08/07/2019 22:26
Changes: 03/16/2015 17:00 (74), 08/07/2019 22:26 (12)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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