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.

Published: 2013-07-09 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-2053 is rated Moderate Risk (54.9/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.65%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2013-2053

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 2.04% 1.65% -0.40%
2 2025-03-29 1.65% 2.04% +0.40%
3 2025-03-17 — 1.65% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-2053

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2013-2053

OS Trackers for CVE-2013-2053

vendor priority summary link
gentoo normal CVE-2013-2053: 1 GLSA(s) (201401-09), 1 atom(s) (net-misc/openswan); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2013-2053
redhat high — https://access.redhat.com/security/cve/CVE-2013-2053
ubuntu medium CVE-2013-2053 medium priority: Ubuntu including 1 source packages (openswan), 17 status rows across 17 suites (artful, bionic, cosmic, disco, lucid, precise, quantal, raring, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): DNE 11, ignored 5, needs-triage 1. https://ubuntu.com/security/CVE-2013-2053

Affected software / configurations for CVE-2013-2053

Vendor Product Version Raw CPE
xelerance openswan <= 2.6.38 cpe:2.3:a:xelerance:openswan:*:*:*:*:*:*:*:*
xelerance openswan 2.6.01 cpe:2.3:a:xelerance:openswan:2.6.01:*:*:*:*:*:*:*
xelerance openswan 2.6.02 cpe:2.3:a:xelerance:openswan:2.6.02:*:*:*:*:*:*:*
xelerance openswan 2.6.03 cpe:2.3:a:xelerance:openswan:2.6.03:*:*:*:*:*:*:*
xelerance openswan 2.6.04 cpe:2.3:a:xelerance:openswan:2.6.04:*:*:*:*:*:*:*
xelerance openswan 2.6.05 cpe:2.3:a:xelerance:openswan:2.6.05:*:*:*:*:*:*:*
xelerance openswan 2.6.06 cpe:2.3:a:xelerance:openswan:2.6.06:*:*:*:*:*:*:*
xelerance openswan 2.6.07 cpe:2.3:a:xelerance:openswan:2.6.07:*:*:*:*:*:*:*
xelerance openswan 2.6.08 cpe:2.3:a:xelerance:openswan:2.6.08:*:*:*:*:*:*:*
xelerance openswan 2.6.09 cpe:2.3:a:xelerance:openswan:2.6.09:*:*:*:*:*:*:*
xelerance openswan 2.6.10 cpe:2.3:a:xelerance:openswan:2.6.10:*:*:*:*:*:*:*
xelerance openswan 2.6.11 cpe:2.3:a:xelerance:openswan:2.6.11:*:*:*:*:*:*:*
xelerance openswan 2.6.12 cpe:2.3:a:xelerance:openswan:2.6.12:*:*:*:*:*:*:*
xelerance openswan 2.6.13 cpe:2.3:a:xelerance:openswan:2.6.13:*:*:*:*:*:*:*
xelerance openswan 2.6.14 cpe:2.3:a:xelerance:openswan:2.6.14:*:*:*:*:*:*:*
xelerance openswan 2.6.15 cpe:2.3:a:xelerance:openswan:2.6.15:*:*:*:*:*:*:*
xelerance openswan 2.6.16 cpe:2.3:a:xelerance:openswan:2.6.16:*:*:*:*:*:*:*
xelerance openswan 2.6.17 cpe:2.3:a:xelerance:openswan:2.6.17:*:*:*:*:*:*:*
xelerance openswan 2.6.18 cpe:2.3:a:xelerance:openswan:2.6.18:*:*:*:*:*:*:*
xelerance openswan 2.6.19 cpe:2.3:a:xelerance:openswan:2.6.19:*:*:*:*:*:*:*
xelerance openswan 2.6.20 cpe:2.3:a:xelerance:openswan:2.6.20:*:*:*:*:*:*:*
xelerance openswan 2.6.21 cpe:2.3:a:xelerance:openswan:2.6.21:*:*:*:*:*:*:*
xelerance openswan 2.6.22 cpe:2.3:a:xelerance:openswan:2.6.22:*:*:*:*:*:*:*
xelerance openswan 2.6.23 cpe:2.3:a:xelerance:openswan:2.6.23:*:*:*:*:*:*:*
xelerance openswan 2.6.24 cpe:2.3:a:xelerance:openswan:2.6.24:*:*:*:*:*:*:*
xelerance openswan 2.6.25 cpe:2.3:a:xelerance:openswan:2.6.25:*:*:*:*:*:*:*
xelerance openswan 2.6.26 cpe:2.3:a:xelerance:openswan:2.6.26:*:*:*:*:*:*:*
xelerance openswan 2.6.27 cpe:2.3:a:xelerance:openswan:2.6.27:*:*:*:*:*:*:*
xelerance openswan 2.6.28 cpe:2.3:a:xelerance:openswan:2.6.28:*:*:*:*:*:*:*
xelerance openswan 2.6.29 cpe:2.3:a:xelerance:openswan:2.6.29:*:*:*:*:*:*:*
xelerance openswan 2.6.30 cpe:2.3:a:xelerance:openswan:2.6.30:*:*:*:*:*:*:*
xelerance openswan 2.6.31 cpe:2.3:a:xelerance:openswan:2.6.31:*:*:*:*:*:*:*
xelerance openswan 2.6.32 cpe:2.3:a:xelerance:openswan:2.6.32:*:*:*:*:*:*:*
xelerance openswan 2.6.33 cpe:2.3:a:xelerance:openswan:2.6.33:*:*:*:*:*:*:*
xelerance openswan 2.6.34 cpe:2.3:a:xelerance:openswan:2.6.34:*:*:*:*:*:*:*
xelerance openswan 2.6.35 cpe:2.3:a:xelerance:openswan:2.6.35:*:*:*:*:*:*:*
xelerance openswan 2.6.36 cpe:2.3:a:xelerance:openswan:2.6.36:*:*:*:*:*:*:*
xelerance openswan 2.6.37 cpe:2.3:a:xelerance:openswan:2.6.37:*:*:*:*:*:*:*

References for CVE-2013-2053

cvelogic Threat Intelligence