How severe is CVE-2013-4353?

CVE-2013-4353 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2013-4353 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4353?

CVE-2013-4353 primarily affects Openssl. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-4353?

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

When was CVE-2013-4353 published?

CVE-2013-4353 was published on 2014-01-09 and last updated on 2026-06-16.

CVE-2013-4353

CVE-2013-4353 is a medium-severity vulnerability in Openssl with a CVSS 2.0 base score of 4.3. Its EPSS exploit-prediction score of 12% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 12% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Openssl
Published: 2014-01-09
Last modified: 2026-06-16

Description

The ssl3_take_mac function in ssl/s3_both.c in OpenSSL 1.0.1 before 1.0.1f allows remote TLS servers to cause a denial of service (NULL pointer dereference and application crash) via a crafted Next Protocol Negotiation record in a TLS handshake.

Frequently asked questions

What is CVE-2013-4353?: The ssl3_take_mac function in ssl/s3_both.c in OpenSSL 1.0.1 before 1.0.1f allows remote TLS servers to cause a denial of service (NULL pointer dereference and application crash) via a crafted Next Protocol Negotiation record in a TLS handshake.
How severe is CVE-2013-4353?: CVE-2013-4353 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2013-4353 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4353?: CVE-2013-4353 primarily affects Openssl. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-4353?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-4353 published?: CVE-2013-4353 was published on 2014-01-09 and last updated on 2026-06-16.

References

Affected products (9)

cpe:2.3:a:openssl:openssl:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1:beta1:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1:beta2:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1:beta3:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1a:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1b:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1c:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1d:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.1e:*:*:*:*:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

218.4.91.163 (ipv4-addr)
200.77.172.159 (ipv4-addr)
200.196.50.91 (ipv4-addr)
166.62.41.190 (ipv4-addr)
50.62.22.47 (ipv4-addr)
191.101.33.225 (ipv4-addr)
192.169.197.123 (ipv4-addr)