Vulnerability Name:

CVE-2011-4623 (CCN-71953)

Assigned:2011-02-09
Published:2011-02-09
Updated:2023-02-13
Summary: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.
CVSS v3 Severity:5.9 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): Low
CVSS v2 Severity:2.1 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P)
1.6 Low (Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P/E:U/RL:TF/RC:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P)
3.5 Low (CCN Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P/E:U/RL:TF/RC:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
5.4 Medium (REDHAT CVSS v2 Vector: AV:A/AC:M/Au:N/C:P/I:P/A:P)
4.1 Medium (REDHAT Temporal CVSS v2 Vector: AV:A/AC:M/Au:N/C:P/I:P/A:P/E:U/RL:TF/RC:C)
Exploitability Metrics:Access Vector (AV): Adjacent_Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
Vulnerability Consequences:Gain Privileges
References:Source: secalert@redhat.com
Type: UNKNOWN
secalert@redhat.com

Source: MITRE
Type: CNA
CVE-2011-4623

Source: secalert@redhat.com
Type: UNKNOWN
secalert@redhat.com

Source: CCN
Type: rsyslog GIT Repository
rsyslog

Source: CCN
Type: RHSA-2012-0796
Moderate: rsyslog security, bug fix, and enhancement update

Source: CCN
Type: RSyslog Web Site
The enhanced syslogd for Linux and Unix rsyslog

Source: secalert@redhat.com
Type: UNKNOWN
secalert@redhat.com

Source: secalert@redhat.com
Type: UNKNOWN
secalert@redhat.com

Source: secalert@redhat.com
Type: UNKNOWN
secalert@redhat.com

Source: CCN
Type: SA45848
rsyslog "parseLegacySyslogMsg()" Malformed TAG Off-By-Two Vulnerability

Source: secalert@redhat.com
Type: UNKNOWN
secalert@redhat.com

Source: CCN
Type: OSVDB ID: 78510
rsyslog runtime/stringbuf.c rsCStrExtendBuf() Function Message Parsing Remote Overflow

Source: CCN
Type: BID-51171
RSyslog Function Imfile Module Buffer Overflow Vulnerability

Source: secalert@redhat.com
Type: UNKNOWN
secalert@redhat.com

Source: secalert@redhat.com
Type: UNKNOWN
secalert@redhat.com

Source: secalert@redhat.com
Type: Patch, Vendor Advisory
secalert@redhat.com

Source: CCN
Type: Red Hat Bugzilla Bug 769822
rsyslog: DoS due integer signedness error while extending rsyslog counted string buffer

Source: secalert@redhat.com
Type: UNKNOWN
secalert@redhat.com

Source: XF
Type: UNKNOWN
rsyslog-imfile-bo(71953)

Vulnerable Configuration:Configuration RedHat 1:
  • cpe:/o:redhat:enterprise_linux:6:*:*:*:*:*:*:*
    • Configuration RedHat 2:
  • cpe:/o:redhat:enterprise_linux:6::client:*:*:*:*:*
    • Configuration RedHat 3:
  • cpe:/o:redhat:enterprise_linux:6::computenode:*:*:*:*:*
    • Configuration RedHat 4:
  • cpe:/o:redhat:enterprise_linux:6::server:*:*:*:*:*
    • Configuration RedHat 5:
  • cpe:/o:redhat:enterprise_linux:6::workstation:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:rsyslog:rsyslog:4.1.1:*:*:*:*:*:*:*
  • OR cpe:/a:rsyslog:rsyslog:3.12.1:*:*:*:*:*:*:*
  • AND
  • cpe:/o:redhat:enterprise_linux:6:*:server:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux:6:*:workstation:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux_desktop:6:*:*:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux_hpc_node:6:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.mitre.oval:def:15456
    P
    		USN-1338-1 -- Rsyslog vulnerability
    2014-06-30
    oval:org.mitre.oval:def:22990
    P
    		ELSA-2012:0796: rsyslog security, bug fix, and enhancement update (Moderate)
    2014-05-26
    oval:org.mitre.oval:def:21554
    P
    		RHSA-2012:0796: rsyslog security, bug fix, and enhancement update (Moderate)
    2014-02-24
    oval:com.redhat.rhsa:def:20120796
    P
    		RHSA-2012:0796: rsyslog security, bug fix, and enhancement update (Moderate)
    2012-06-20
    BACK
    rsyslog rsyslog 4.1.1
    rsyslog rsyslog 3.12.1
    redhat enterprise linux 6
    redhat enterprise linux 6
    redhat enterprise linux desktop 6
    redhat enterprise linux hpc node 6