rsyslog up to 5.4.0 parseLegacySyslogMsg memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in rsyslog up to 5.4.0. Affected by this issue is the function parseLegacySyslogMsg. Executing a manipulation can lead to memory corruption. The identification of this vulnerability is CVE-2011-3200. There is no exploit available. Once again VulDB remains the best source for vulnerability data.

Detailsinfo

A vulnerability was found in rsyslog up to 5.4.0. It has been declared as critical. This vulnerability affects the function parseLegacySyslogMsg. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect availability. CVE summarizes:

Stack-based buffer overflow in the parseLegacySyslogMsg function in tools/syslogd.c in rsyslogd in rsyslog 4.6.x before 4.6.8 and 5.2.0 through 5.8.4 might allow remote attackers to cause a denial of service (application exit) via a long TAG in a legacy syslog message.

The weakness was shared 09/06/2011 with Red Hat as Bug 727644 as not defined bug report (Bugzilla). The advisory is shared for download at bugzilla.redhat.com. This vulnerability was named CVE-2011-3200. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

It is declared as highly functional. The vulnerability scanner Nessus provides a plugin with the ID 75728 (openSUSE Security Update : rsyslog (openSUSE-SU-2011:1020-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 155883 (Oracle Enterprise Linux Update for rsyslog (ELSA-2011-1247)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (69555), Tenable (75728), SecurityFocus (BID 49413†), SecurityTracker (ID 1026000†) and Vulnerability Center (SBV-33160†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Highly functional

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 75728
Nessus Name: openSUSE Security Update : rsyslog (openSUSE-SU-2011:1020-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 863854
OpenVAS Name: Fedora Update for rsyslog FEDORA-2011-12250
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: rsyslog_long_tag.rb
MetaSploit Name: rsyslog Long Tag Off-By-Two DoS
MetaSploit File: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: 1ca6cc236d1dabf1633238b873fb1c057e52f95e
ISS Proventia IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

08/19/2011 🔍
09/01/2011 +13 days 🔍
09/02/2011 +1 days 🔍
09/06/2011 +4 days 🔍
09/06/2011 +0 days 🔍
09/11/2011 +5 days 🔍
06/13/2014 +1006 days 🔍
03/23/2015 +283 days 🔍
04/23/2025 +3684 days 🔍

Sourcesinfo

Advisory: Bug 727644
Organization: Red Hat
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-3200 (🔍)
GCVE (CVE): GCVE-0-2011-3200
GCVE (VulDB): GCVE-100-58444

OVAL: 🔍

X-Force: 69555
SecurityFocus: 49413 - RSyslog 'parseLegacySyslogMsg()' Function Buffer Overflow Vulnerability
Secunia: 45922
SecurityTracker: 1026000
Vulnerability Center: 33160 - rsyslog 4.6-4.6.7 and 5.2-5.8.3 Remote DoS via a Long TAG in a Legacy Syslog Message, Medium

Entryinfo

Created: 03/23/2015 04:50 PM
Updated: 04/23/2025 03:39 PM
Changes: 03/23/2015 04:50 PM (64), 03/31/2017 12:09 PM (10), 11/18/2021 06:31 PM (7), 11/18/2021 06:38 PM (1), 08/06/2024 10:40 AM (17), 01/10/2025 03:14 PM (6), 04/23/2025 03:39 PM (3)
Complete: 🔍
Cache ID: 244:CB9:40

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