How severe is CVE-2013-4758?

CVE-2013-4758 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2013-4758 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4758?

CVE-2013-4758 primarily affects Rsyslog. In total, 42 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-4758?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2013-4758 published?

CVE-2013-4758 was published on 2013-10-04 and last updated on 2026-06-16.

CVE-2013-4758

CVE-2013-4758 is a medium-severity vulnerability in Rsyslog with a CVSS 2.0 base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Rsyslog
Published: 2013-10-04
Last modified: 2026-06-16

Description

Double free vulnerability in the writeDataError function in the ElasticSearch plugin (omelasticsearch) in rsyslog before 7.4.2 and before 7.5.2 devel, when errorfile is set to local logging, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted JSON response.

Frequently asked questions

What is CVE-2013-4758?: Double free vulnerability in the writeDataError function in the ElasticSearch plugin (omelasticsearch) in rsyslog before 7.4.2 and before 7.5.2 devel, when errorfile is set to local logging, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted JSON response.
How severe is CVE-2013-4758?: CVE-2013-4758 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2013-4758 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4758?: CVE-2013-4758 primarily affects Rsyslog. In total, 42 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-4758?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-4758 published?: CVE-2013-4758 was published on 2013-10-04 and last updated on 2026-06-16.

References

Affected products (42)

cpe:2.3:a:rsyslog:rsyslog:*:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:*:devel:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:6.4.2:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:6.5.1:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:6.6.0:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.1.0:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.1.1:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.1.2:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.1.3:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.1.4:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.1.5:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.1.6:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.1.7:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.1.8:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.1.9:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.1.10:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.1.11:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.1.12:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.2.1:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.2.2:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.2.3:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.2.4:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.2.5:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.2.6:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.2.7:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.3.0:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.3.1:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.3.3:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.3.4:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.3.5:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.3.6:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.3.7:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.3.8:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.3.9:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.3.10:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.3.11:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.3.12:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.3.13:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.3.14:*:*:*:*:*:*:*
cpe:2.3:a:rsyslog:rsyslog:7.3.15:*:*:*:*:*:*:*

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