HOMEVULNERABILITIESCVE-2009-0790
MEDIUM

CVE-2009-0790

CWE-20Published: April 1, 2009· Updated: Jun 16, 2026

5.0
CVSS v3.1

Official Description

The pluto IKE daemon in Openswan and Strongswan IPsec 2.6 before 2.6.21 and 2.4 before 2.4.14, and Strongswan 4.2 before 4.2.14 and 2.8 before 2.8.9, allows remote attackers to cause a denial of service (daemon crash and restart) via a crafted (1) R_U_THERE or (2) R_U_THERE_ACK Dead Peer Detection (DPD) IPsec IKE Notification message that triggers a NULL pointer dereference related to inconsistent ISAKMP state and the lack of a phase2 state association in DPD.

NVD Source

Technical Analysis

CVE-2009-0790 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

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 VectorNetwork
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityNone
IntegrityNone
AvailabilityP
AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected Vendors & Products

strongswan1 product(s)
strongswan
xelerance1 product(s)
openswan
Source: NVD CPE · 60 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
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

PATCHhttp://www.debian.org/security/2009/dsa-1759
PATCHhttp://www.debian.org/security/2009/dsa-1760
PATCHhttp://www.securityfocus.com/bid/34296
PATCHhttp://www.debian.org/security/2009/dsa-1759
PATCHhttp://www.debian.org/security/2009/dsa-1760
PATCHhttp://www.securityfocus.com/bid/34296
ADVISORYhttp://download.strongswan.org/CHANGES4.txt
ADVISORYhttp://secunia.com/advisories/34472
ADVISORYhttp://secunia.com/advisories/34483
ADVISORYhttp://secunia.com/advisories/34494
ADVISORYhttp://secunia.com/advisories/34546
ADVISORYhttp://www.openswan.org/CVE-2009-0790/CVE-2009-0790.txt
ADVISORYhttp://download.strongswan.org/CHANGES4.txt
ADVISORYhttp://secunia.com/advisories/34472
ADVISORYhttp://secunia.com/advisories/34483
ADVISORYhttp://secunia.com/advisories/34494
ADVISORYhttp://secunia.com/advisories/34546
ADVISORYhttp://www.openswan.org/CVE-2009-0790/CVE-2009-0790.txt

All References (34)

→
http://download.strongswan.org/CHANGES4.txtVendor Advisory
→
http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00010.html
→
http://secunia.com/advisories/34472Vendor Advisory
→
http://secunia.com/advisories/34483Vendor Advisory
→
http://secunia.com/advisories/34494Vendor Advisory
→
http://secunia.com/advisories/34546Vendor Advisory
→
http://www.debian.org/security/2009/dsa-1759Patch
→
http://www.debian.org/security/2009/dsa-1760Patch
→
http://www.openswan.org/CVE-2009-0790/CVE-2009-0790.txtVendor Advisory
→
http://www.redhat.com/support/errata/RHSA-2009-0402.html
→
http://www.securityfocus.com/archive/1/502270/100/0/threaded
→
http://www.securityfocus.com/bid/34296Patch
→
http://www.securitytracker.com/id?1021949
→
http://www.securitytracker.com/id?1021950
→
http://www.vupen.com/english/advisories/2009/0886

Quick Facts

CVE IDCVE-2009-0790
CVSS Score5.0 / 10
SeverityMEDIUM
WeaknessCWE-20
CISA KEVNo
Affected2 vendor(s)
PublishedApr 1, 2009

Related CVEs (CWE-20)

CVE-2008-4404
10.0
CVE-2008-3111
10.0
CVE-2008-2157
10.0
CVE-2008-4358
10.0
CVE-2008-1030
10.0
CVE-2008-5810
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2009-0790 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.
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