CVE-2013-2053

CVE-2013-2053 is a medium-severity vulnerability in Xelerance Openswan 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-119.

Key facts

• Severity: Medium (CVSS 2.0 base score 6.8)
• EPSS exploit prediction: 2% (82nd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-119
• Affected product: Xelerance Openswan
• Published: 2013-07-09
• Last modified: 2026-06-16

Description

Buffer overflow in the atodn function in Openswan before 2.6.39, when Opportunistic Encryption is enabled and an RSA key is being used, allows remote attackers to cause a denial of service (pluto IKE daemon crash) and possibly execute arbitrary code via crafted DNS TXT records. NOTE: this might be the same vulnerability as CVE-2013-2052 and CVE-2013-2054.

Frequently asked questions

What is CVE-2013-2053?

Buffer overflow in the atodn function in Openswan before 2.6.39, when Opportunistic Encryption is enabled and an RSA key is being used, allows remote attackers to cause a denial of service (pluto IKE daemon crash) and possibly execute arbitrary code via crafted DNS TXT records. NOTE: this might be the same vulnerability as CVE-2013-2052 and CVE-2013-2054.

How severe is CVE-2013-2053?

CVE-2013-2053 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2013-2053 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-2053?

CVE-2013-2053 primarily affects Xelerance Openswan. In total, 38 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-2053?

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

When was CVE-2013-2053 published?

CVE-2013-2053 was published on 2013-07-09 and last updated on 2026-06-16.

References

• http://lists.opensuse.org/opensuse-security-announce/2013-07/msg00008.html
• http://rhn.redhat.com/errata/RHSA-2013-0827.html
• http://www.debian.org/security/2014/dsa-2893
• http://www.securityfocus.com/bid/59838
• https://bugzilla.redhat.com/show_bug.cgi?id=960229
• https://lists.libreswan.org/pipermail/swan-announce/2013/000003.html
• https://www.openswan.org/news/13

Affected products (38)

• cpe:2.3:a:xelerance:openswan:*:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.01:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.02:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.03:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.04:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.05:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.06:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.07:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.08:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.09:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.10:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.11:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.12:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.13:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.14:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.15:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.16:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.17:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.18:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.19:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.20:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.21:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.22:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.23:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.24:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.25:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.26:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.27:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.28:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.29:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.30:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.31:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.32:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.33:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.34:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.35:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.36:*:*:*:*:*:*:*
• cpe:2.3:a:xelerance:openswan:2.6.37:*:*:*:*:*:*:*

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• CVE-2005-0162 — High (CVSS 7.2): Stack-based buffer overflow in the get_internal_addresses function in the pluto application for Openswan 1.x before…
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