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CVE-2011-3200

38
FAUCET Score

CVE-2011-3200 describes a stack-based buffer overflow in the parseLegacySyslogMsg function of rsyslogd, affecting versions 4.6.x before 4.6.8 and 5.2.0 through 5.8.4. This vulnerability allows remote attackers to cause a denial of service by sending a crafted legacy syslog message with an excessively long TAG. With a CVSS score of 5.0 (AV:N/AC:L/Au:N/C:N/I:N/A:P), it is remotely exploitable with low attack complexity, leading to application exit. While not listed in CISA's KEV catalog, a Metasploit module exists for this DoS vulnerability, though there is minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
4.6.0CPE matchmatch criteria
cpe:2.3:a:rsyslog:rsyslog:4.6.0:*:*:*:*:*:*:*
4.6.1CPE matchmatch criteria
cpe:2.3:a:rsyslog:rsyslog:4.6.1:*:*:*:*:*:*:*
4.6.2CPE matchmatch criteria
cpe:2.3:a:rsyslog:rsyslog:4.6.2:*:*:*:*:*:*:*
4.6.3CPE matchmatch criteria
cpe:2.3:a:rsyslog:rsyslog:4.6.3:*:*:*:*:*:*:*
4.6.4CPE matchmatch criteria
cpe:2.3:a:rsyslog:rsyslog:4.6.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
20.76%
Probability of exploitation in next 30 days
EPSS Percentile
97.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
Metasploit: rsyslog Long Tag Off-By-Two DoS · Sep 1, 2011
This CVE's current EPSS score of 0.2076 is in the 97th percentile among its peer group of 23,690 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: rsyslog-0:4.6.2-3.el6_1.2
View patch

Vendor Advisories (1)

redhatCVE-2011-3200Moderate

rsyslog: parseLegacySyslogMsg off-by-two buffer overflow

Sep 1, 2011

References

git.adiscon.com
lists.fedoraproject.org / pipermail/package-announce/2011-September/065837.html
lists.fedoraproject.org / pipermail/package-announce/2011-September/065941.html
lists.opensuse.org / opensuse-updates/2011-09/msg00013.html
bugzilla.redhat.com / show_bug.cgi
Patch
secunia.com / advisories/45922
secunia.com / advisories/46027
securitytracker.com / id
mandriva.com / security/advisories
redhat.com / support/errata/RHSA-2011-1247.html
rsyslog.com / potential-dos-with-malformed-tag
PatchVendor Advisory
securityfocus.com / bid/49413