rsyslog up to 4.3.1 rsCStrExtendBuf numeric error

CVSS Meta Temp Score
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CTI Interest Score
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3.8$0-$5k0.00

Summaryinfo

A vulnerability was found in rsyslog. It has been rated as problematic. This affects the function rsCStrExtendBuf. Performing a manipulation results in numeric error. This vulnerability was named CVE-2011-4623. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in rsyslog. This affects the function rsCStrExtendBuf. The manipulation with an unknown input leads to a numeric error vulnerability. CWE is classifying the issue as CWE-189. This is going to have an impact on availability. The summary by CVE is:

Integer overflow in the rsCStrExtendBuf function in runtime/stringbuf.c in the imfile module in rsyslog 4.x before 4.6.6, 5.x before 5.7.4, and 6.x before 6.1.4 allows local users to cause a denial of service (daemon hang) via a large file, which triggers a heap-based buffer overflow.

The weakness was presented 09/25/2012 with isen (Website). The advisory is shared at ubuntu.com. This vulnerability is uniquely identified as CVE-2011-4623 since 11/29/2011. The exploitability is told to be easy. An attack has to be approached locally. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 69595 (Amazon Linux AMI : rsyslog (ALAS-2012-105)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350642 (Amazon Linux Security Advisory for rsyslog: ALAS-2012-105).

Upgrading to version 5.4.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (71953), Tenable (69595), SecurityFocus (BID 51171†), Secunia (SA45848†) and SecurityTracker (ID 1026556†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.8

VulDB Base Score: 4.0
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 69595
Nessus Name: Amazon Linux AMI : rsyslog (ALAS-2012-105)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 881131
OpenVAS Name: CentOS Update for rsyslog CESA-2012:0796 centos6
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: rsyslog 5.4.0

Timelineinfo

09/02/2011 🔍
11/29/2011 +88 days 🔍
12/22/2011 +23 days 🔍
12/23/2011 +1 days 🔍
01/23/2012 +31 days 🔍
05/31/2012 +129 days 🔍
09/25/2012 +117 days 🔍
09/25/2012 +0 days 🔍
09/04/2013 +344 days 🔍
03/24/2015 +566 days 🔍
01/05/2025 +3575 days 🔍

Sourcesinfo

Advisory: RHSA-2012:0796
Organization: isen
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-4623 (🔍)
GCVE (CVE): GCVE-0-2011-4623
GCVE (VulDB): GCVE-100-62433

OVAL: 🔍

X-Force: 71953
SecurityFocus: 51171 - RSyslog Function Imfile Module Buffer Overflow Vulnerability
Secunia: 45848 - rsyslog Two Vulnerabilities, Moderately Critical
SecurityTracker: 1026556 - rsyslog imfile Integer Signedness Error Lets Local Users Deny Service
Vulnerability Center: 35234 - RSyslog 3.12.1 through 4.1.1 Local Arbitrary Code Execution Vulnerability, Medium

Entryinfo

Created: 03/24/2015 12:22
Updated: 01/05/2025 18:36
Changes: 03/24/2015 12:22 (61), 04/13/2017 12:55 (18), 12/14/2021 09:43 (3), 12/14/2021 09:46 (2), 01/05/2025 18:36 (17)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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