CVE-2011-3200

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.

Published: 2011-09-06 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-3200 is rated Moderate Risk (49/100): CVSS Medium severity, with high exploitation likelihood (EPSS 20.76%, 97th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-3200

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 65.08% 20.76% -44.32%
2 2026-06-13 63.91% 65.08% +1.17%
3 2026-05-16 — 63.91% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-3200

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2011-3200

OS Trackers for CVE-2011-3200

vendor priority summary link
debian low CVE-2011-3200 low priority: Debian including 1 source packages (rsyslog), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2011-3200
redhat medium — https://access.redhat.com/security/cve/CVE-2011-3200
suse medium CVE-2011-3200 severity moderate: SUSE including 129 source package names (rsyslog-5.10.1-0.11.1, rsyslog-5.10.1-0.7.49, …), 166 product×package rows across 23 product lines (SUSE Linux Enterprise Desktop 12, SUSE Linux Enterprise Desktop 12 SP1, … (23 product lines)): Fixed 166. https://www.suse.com/security/cve/CVE-2011-3200/
ubuntu low CVE-2011-3200 low priority: Ubuntu including 1 source packages (rsyslog), 5 status rows across 5 suites (hardy, lucid, maverick, natty, upstream): not-affected 3, released 2. https://ubuntu.com/security/CVE-2011-3200

Affected software / configurations for CVE-2011-3200

Vendor Product Version Raw CPE
rsyslog rsyslog 4.6.0 cpe:2.3:a:rsyslog:rsyslog:4.6.0:*:*:*:*:*:*:*
rsyslog rsyslog 4.6.1 cpe:2.3:a:rsyslog:rsyslog:4.6.1:*:*:*:*:*:*:*
rsyslog rsyslog 4.6.2 cpe:2.3:a:rsyslog:rsyslog:4.6.2:*:*:*:*:*:*:*
rsyslog rsyslog 4.6.3 cpe:2.3:a:rsyslog:rsyslog:4.6.3:*:*:*:*:*:*:*
rsyslog rsyslog 4.6.4 cpe:2.3:a:rsyslog:rsyslog:4.6.4:*:*:*:*:*:*:*
rsyslog rsyslog 4.6.5 cpe:2.3:a:rsyslog:rsyslog:4.6.5:*:*:*:*:*:*:*
rsyslog rsyslog 4.6.6 cpe:2.3:a:rsyslog:rsyslog:4.6.6:*:*:*:*:*:*:*
rsyslog rsyslog 4.6.7 cpe:2.3:a:rsyslog:rsyslog:4.6.7:*:*:*:*:*:*:*
rsyslog rsyslog 5.2.0 cpe:2.3:a:rsyslog:rsyslog:5.2.0:*:*:*:*:*:*:*
rsyslog rsyslog 5.2.1 cpe:2.3:a:rsyslog:rsyslog:5.2.1:*:*:*:*:*:*:*
rsyslog rsyslog 5.2.2 cpe:2.3:a:rsyslog:rsyslog:5.2.2:*:*:*:*:*:*:*
rsyslog rsyslog 5.3.1 cpe:2.3:a:rsyslog:rsyslog:5.3.1:*:*:*:*:*:*:*
rsyslog rsyslog 5.3.2 cpe:2.3:a:rsyslog:rsyslog:5.3.2:*:*:*:*:*:*:*
rsyslog rsyslog 5.3.3 cpe:2.3:a:rsyslog:rsyslog:5.3.3:*:*:*:*:*:*:*
rsyslog rsyslog 5.3.4 cpe:2.3:a:rsyslog:rsyslog:5.3.4:*:*:*:*:*:*:*
rsyslog rsyslog 5.3.5 cpe:2.3:a:rsyslog:rsyslog:5.3.5:*:*:*:*:*:*:*
rsyslog rsyslog 5.3.6 cpe:2.3:a:rsyslog:rsyslog:5.3.6:*:*:*:*:*:*:*
rsyslog rsyslog 5.3.7 cpe:2.3:a:rsyslog:rsyslog:5.3.7:*:*:*:*:*:*:*
rsyslog rsyslog 5.4.0 cpe:2.3:a:rsyslog:rsyslog:5.4.0:*:*:*:*:*:*:*
rsyslog rsyslog 5.4.1 cpe:2.3:a:rsyslog:rsyslog:5.4.1:*:*:*:*:*:*:*
rsyslog rsyslog 5.4.2 cpe:2.3:a:rsyslog:rsyslog:5.4.2:*:*:*:*:*:*:*
rsyslog rsyslog 5.5.0 cpe:2.3:a:rsyslog:rsyslog:5.5.0:*:*:*:*:*:*:*
rsyslog rsyslog 5.5.1 cpe:2.3:a:rsyslog:rsyslog:5.5.1:*:*:*:*:*:*:*
rsyslog rsyslog 5.5.2 cpe:2.3:a:rsyslog:rsyslog:5.5.2:*:*:*:*:*:*:*
rsyslog rsyslog 5.5.3 cpe:2.3:a:rsyslog:rsyslog:5.5.3:*:*:*:*:*:*:*
rsyslog rsyslog 5.5.4 cpe:2.3:a:rsyslog:rsyslog:5.5.4:*:*:*:*:*:*:*
rsyslog rsyslog 5.5.5 cpe:2.3:a:rsyslog:rsyslog:5.5.5:*:*:*:*:*:*:*
rsyslog rsyslog 5.5.6 cpe:2.3:a:rsyslog:rsyslog:5.5.6:*:*:*:*:*:*:*
rsyslog rsyslog 5.5.7 cpe:2.3:a:rsyslog:rsyslog:5.5.7:*:*:*:*:*:*:*
rsyslog rsyslog 5.6.0 cpe:2.3:a:rsyslog:rsyslog:5.6.0:*:*:*:*:*:*:*
rsyslog rsyslog 5.6.1 cpe:2.3:a:rsyslog:rsyslog:5.6.1:*:*:*:*:*:*:*
rsyslog rsyslog 5.6.2 cpe:2.3:a:rsyslog:rsyslog:5.6.2:*:*:*:*:*:*:*
rsyslog rsyslog 5.6.3 cpe:2.3:a:rsyslog:rsyslog:5.6.3:*:*:*:*:*:*:*
rsyslog rsyslog 5.6.4 cpe:2.3:a:rsyslog:rsyslog:5.6.4:*:*:*:*:*:*:*
rsyslog rsyslog 5.6.5 cpe:2.3:a:rsyslog:rsyslog:5.6.5:*:*:*:*:*:*:*
rsyslog rsyslog 5.7.0 cpe:2.3:a:rsyslog:rsyslog:5.7.0:*:*:*:*:*:*:*
rsyslog rsyslog 5.7.1 cpe:2.3:a:rsyslog:rsyslog:5.7.1:*:*:*:*:*:*:*
rsyslog rsyslog 5.7.2 cpe:2.3:a:rsyslog:rsyslog:5.7.2:*:*:*:*:*:*:*
rsyslog rsyslog 5.7.3 cpe:2.3:a:rsyslog:rsyslog:5.7.3:*:*:*:*:*:*:*
rsyslog rsyslog 5.7.4 cpe:2.3:a:rsyslog:rsyslog:5.7.4:*:*:*:*:*:*:*
rsyslog rsyslog 5.7.5 cpe:2.3:a:rsyslog:rsyslog:5.7.5:*:*:*:*:*:*:*
rsyslog rsyslog 5.7.6 cpe:2.3:a:rsyslog:rsyslog:5.7.6:*:*:*:*:*:*:*
rsyslog rsyslog 5.7.7 cpe:2.3:a:rsyslog:rsyslog:5.7.7:*:*:*:*:*:*:*
rsyslog rsyslog 5.7.8 cpe:2.3:a:rsyslog:rsyslog:5.7.8:*:*:*:*:*:*:*
rsyslog rsyslog 5.7.9 cpe:2.3:a:rsyslog:rsyslog:5.7.9:*:*:*:*:*:*:*
rsyslog rsyslog 5.7.10 cpe:2.3:a:rsyslog:rsyslog:5.7.10:*:*:*:*:*:*:*
rsyslog rsyslog 5.8.0 cpe:2.3:a:rsyslog:rsyslog:5.8.0:*:*:*:*:*:*:*
rsyslog rsyslog 5.8.1 cpe:2.3:a:rsyslog:rsyslog:5.8.1:*:*:*:*:*:*:*
rsyslog rsyslog 5.8.2 cpe:2.3:a:rsyslog:rsyslog:5.8.2:*:*:*:*:*:*:*
rsyslog rsyslog 5.8.3 cpe:2.3:a:rsyslog:rsyslog:5.8.3:*:*:*:*:*:*:*
rsyslog rsyslog 5.8.4 cpe:2.3:a:rsyslog:rsyslog:5.8.4:*:*:*:*:*:*:*

References for CVE-2011-3200

cvelogic Threat Intelligence