CVE-2011-4623

rsyslog: DoS due integer signedness error while extending rsyslog counted string buffer

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Desbordamiento de entero en la función rsCStrExtendBuf en runtime/stringbuf.c en el módulo imfile en rsyslog v4.x anteriores v4.6.6, v5.x anteriores a v5.7.4, y v6.x anteriores a v6.1.4, permite a atacantes remotos provocar una denegación de servicio (cuelgue del demonio) a través de un fichero grande, que provoca un desbordamiento de búfer basado en memoria dinámica.

The rsyslog packages provide an enhanced, multi-threaded syslog daemon. A numeric truncation error, leading to a heap-based buffer overflow, was found in the way the rsyslog imfile module processed text files containing long lines. An attacker could use this flaw to crash the rsyslogd daemon or, possibly, execute arbitrary code with the privileges of rsyslogd, if they are able to cause a long line to be written to a log file that rsyslogd monitors with imfile. The imfile module is not enabled by default.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

Attack Vector

Adjacent

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2011-11-29 CVE Reserved
2012-01-24 CVE Published
2024-08-07 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-189: Numeric Errors

CAPEC

References (13)

URL	Tag	Source
http://bugzilla.adiscon.com/show_bug.cgi?id=221	X_refsource_confirm
http://git.adiscon.com/?p=rsyslog.git%3Ba=commit%3Bh=6bad782f154b7f838c7371bf99c13f6dc4ec4101	X_refsource_confirm
http://rsyslog.com/changelog-for-4-6-6-v4-stable	X_refsource_confirm
http://rsyslog.com/changelog-for-5-7-4-v5-beta	X_refsource_confirm
http://rsyslog.com/changelog-for-6-1-4-devel	X_refsource_confirm
http://www.openwall.com/lists/oss-security/2011/12/22/2	Mailing List
http://www.securityfocus.com/bid/51171	Vdb Entry
http://www.securitytracker.com/id?1026556	Vdb Entry

URL	Date	SRC

URL	Date	SRC
http://www.ubuntu.com/usn/USN-1338-1	2023-02-13

URL	Date	SRC
http://secunia.com/advisories/45848	2023-02-13
http://secunia.com/advisories/47698	2023-02-13
https://bugzilla.redhat.com/show_bug.cgi?id=769822	2012-06-19
https://access.redhat.com/security/cve/CVE-2011-4623	2012-06-19

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.1.0 Search vendor "Rsyslog" for product "Rsyslog" and version "4.1.0"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.1.1 Search vendor "Rsyslog" for product "Rsyslog" and version "4.1.1"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.1.2 Search vendor "Rsyslog" for product "Rsyslog" and version "4.1.2"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.1.3 Search vendor "Rsyslog" for product "Rsyslog" and version "4.1.3"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.1.4 Search vendor "Rsyslog" for product "Rsyslog" and version "4.1.4"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.1.5 Search vendor "Rsyslog" for product "Rsyslog" and version "4.1.5"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.1.6 Search vendor "Rsyslog" for product "Rsyslog" and version "4.1.6"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.1.7 Search vendor "Rsyslog" for product "Rsyslog" and version "4.1.7"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.2.0 Search vendor "Rsyslog" for product "Rsyslog" and version "4.2.0"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.3.0 Search vendor "Rsyslog" for product "Rsyslog" and version "4.3.0"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.3.1 Search vendor "Rsyslog" for product "Rsyslog" and version "4.3.1"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.3.2 Search vendor "Rsyslog" for product "Rsyslog" and version "4.3.2"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.4.0 Search vendor "Rsyslog" for product "Rsyslog" and version "4.4.0"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.4.1 Search vendor "Rsyslog" for product "Rsyslog" and version "4.4.1"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.4.2 Search vendor "Rsyslog" for product "Rsyslog" and version "4.4.2"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.5.0 Search vendor "Rsyslog" for product "Rsyslog" and version "4.5.0"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.5.1 Search vendor "Rsyslog" for product "Rsyslog" and version "4.5.1"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.5.2 Search vendor "Rsyslog" for product "Rsyslog" and version "4.5.2"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.5.3 Search vendor "Rsyslog" for product "Rsyslog" and version "4.5.3"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.5.4 Search vendor "Rsyslog" for product "Rsyslog" and version "4.5.4"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.5.5 Search vendor "Rsyslog" for product "Rsyslog" and version "4.5.5"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.5.6 Search vendor "Rsyslog" for product "Rsyslog" and version "4.5.6"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.5.7 Search vendor "Rsyslog" for product "Rsyslog" and version "4.5.7"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.5.8 Search vendor "Rsyslog" for product "Rsyslog" and version "4.5.8"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.6.0 Search vendor "Rsyslog" for product "Rsyslog" and version "4.6.0"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.6.1 Search vendor "Rsyslog" for product "Rsyslog" and version "4.6.1"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.6.2 Search vendor "Rsyslog" for product "Rsyslog" and version "4.6.2"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.6.3 Search vendor "Rsyslog" for product "Rsyslog" and version "4.6.3"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.6.4 Search vendor "Rsyslog" for product "Rsyslog" and version "4.6.4"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				4.6.5 Search vendor "Rsyslog" for product "Rsyslog" and version "4.6.5"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.1.0 Search vendor "Rsyslog" for product "Rsyslog" and version "5.1.0"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.1.1 Search vendor "Rsyslog" for product "Rsyslog" and version "5.1.1"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.1.2 Search vendor "Rsyslog" for product "Rsyslog" and version "5.1.2"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.1.3 Search vendor "Rsyslog" for product "Rsyslog" and version "5.1.3"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.1.4 Search vendor "Rsyslog" for product "Rsyslog" and version "5.1.4"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.1.5 Search vendor "Rsyslog" for product "Rsyslog" and version "5.1.5"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.1.6 Search vendor "Rsyslog" for product "Rsyslog" and version "5.1.6"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.2.0 Search vendor "Rsyslog" for product "Rsyslog" and version "5.2.0"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.2.1 Search vendor "Rsyslog" for product "Rsyslog" and version "5.2.1"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.2.2 Search vendor "Rsyslog" for product "Rsyslog" and version "5.2.2"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.3.1 Search vendor "Rsyslog" for product "Rsyslog" and version "5.3.1"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.3.2 Search vendor "Rsyslog" for product "Rsyslog" and version "5.3.2"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.3.3 Search vendor "Rsyslog" for product "Rsyslog" and version "5.3.3"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.3.4 Search vendor "Rsyslog" for product "Rsyslog" and version "5.3.4"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.3.5 Search vendor "Rsyslog" for product "Rsyslog" and version "5.3.5"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.3.6 Search vendor "Rsyslog" for product "Rsyslog" and version "5.3.6"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.3.7 Search vendor "Rsyslog" for product "Rsyslog" and version "5.3.7"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.4.0 Search vendor "Rsyslog" for product "Rsyslog" and version "5.4.0"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.4.1 Search vendor "Rsyslog" for product "Rsyslog" and version "5.4.1"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.4.2 Search vendor "Rsyslog" for product "Rsyslog" and version "5.4.2"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.5.0 Search vendor "Rsyslog" for product "Rsyslog" and version "5.5.0"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.5.1 Search vendor "Rsyslog" for product "Rsyslog" and version "5.5.1"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.5.2 Search vendor "Rsyslog" for product "Rsyslog" and version "5.5.2"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.5.3 Search vendor "Rsyslog" for product "Rsyslog" and version "5.5.3"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.5.4 Search vendor "Rsyslog" for product "Rsyslog" and version "5.5.4"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.5.5 Search vendor "Rsyslog" for product "Rsyslog" and version "5.5.5"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.5.6 Search vendor "Rsyslog" for product "Rsyslog" and version "5.5.6"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.5.7 Search vendor "Rsyslog" for product "Rsyslog" and version "5.5.7"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.6.0 Search vendor "Rsyslog" for product "Rsyslog" and version "5.6.0"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.6.1 Search vendor "Rsyslog" for product "Rsyslog" and version "5.6.1"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.6.2 Search vendor "Rsyslog" for product "Rsyslog" and version "5.6.2"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.6.3 Search vendor "Rsyslog" for product "Rsyslog" and version "5.6.3"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.6.4 Search vendor "Rsyslog" for product "Rsyslog" and version "5.6.4"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.6.5 Search vendor "Rsyslog" for product "Rsyslog" and version "5.6.5"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.7.0 Search vendor "Rsyslog" for product "Rsyslog" and version "5.7.0"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.7.1 Search vendor "Rsyslog" for product "Rsyslog" and version "5.7.1"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.7.2 Search vendor "Rsyslog" for product "Rsyslog" and version "5.7.2"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				5.7.3 Search vendor "Rsyslog" for product "Rsyslog" and version "5.7.3"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				6.1.0 Search vendor "Rsyslog" for product "Rsyslog" and version "6.1.0"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				6.1.1 Search vendor "Rsyslog" for product "Rsyslog" and version "6.1.1"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				6.1.2 Search vendor "Rsyslog" for product "Rsyslog" and version "6.1.2"		-		Affected
Rsyslog Search vendor "Rsyslog"		Rsyslog Search vendor "Rsyslog" for product "Rsyslog"				6.1.3 Search vendor "Rsyslog" for product "Rsyslog" and version "6.1.3"		-		Affected