LOW
CVE-2011-4623
CWE-189Published: September 25, 2012· Updated: Jun 16, 2026
2.1
CVSS v3.1
Official Description
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.
Technical Analysis
CVE-2011-4623 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityNone
IntegrityNone
AvailabilityP
AV:L/AC:L/Au:N/C:N/I:N/A:P
Affected Vendors & Products
rsyslog1 product(s)
rsyslog
Source: NVD CPE · 72 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
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GitHub PoC Search
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Rapid7 / Metasploit
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Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (24)
→
http://secunia.com/advisories/45848Vendor Advisory
→
http://secunia.com/advisories/47698Vendor Advisory
→
http://www.ubuntu.com/usn/USN-1338-1Patch · Vendor Advisory
Quick Facts
CVE IDCVE-2011-4623
CVSS Score2.1 / 10
SeverityLOW
WeaknessCWE-189
CISA KEVNo
Affected1 vendor(s)
PublishedSep 25, 2012
Related CVEs (CWE-189)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2011-4623 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.