Clientless SSL VPN products break web browser domain-based security models
Noroxi assessment
Priority: Monitor (action score 28/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 4.8% (FIRST EPSS); higher than 91.8% of all records.
- According to the record, no fixed version is available yet.
Low priority for now. Update when a fix is released; follow the vendor's advisory.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
Multiple clientless SSL VPN products that run in web browsers, including Stonesoft StoneGate; Cisco ASA; SonicWALL E-Class SSL VPN and SonicWALL SSL VPN; SafeNet SecureWire Access Gateway; Juniper Networks Secure Access; Nortel CallPilot; Citrix Access Gateway; and other products, when running in configurations that do not restrict access to the same domain as the VPN, retrieve the content of remote URLs from one domain and rewrite them so they originate from the VPN's domain, which violates the same origin policy and allows remote attackers to conduct cross-site scripting attacks, read cookies that originated from other domains, access the Web VPN session to gain access to internal resources, perform key logging, and conduct other attacks. NOTE: it could be argued that this is a fundamental design problem in any clientless VPN solution, as opposed to a commonly-introduced error that can be fixed in separate implementations. Therefore a single CVE has been assigned for all products that have this design
- Published
- Dec 4, 2009
- Updated
- Jun 16, 2026
- EPSS
- 4.8% · 91th percentile
- CWE
- CWE-284
Report tools
Action score
28
Monitor
Low priority for now.
- CVSS
- 27 / 40 · 6.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 4.8%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- No fixed version yet
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| cisco | adaptive security appliance | cpe:2.3:h:cisco:adaptive_security_appliance |
| aladdin | safenet securewire access gateway | cpe:2.3:h:aladdin:safenet_securewire_access_gateway |
| sonicwall | e-class ssl vpn | cpe:2.3:h:sonicwall:e-class_ssl_vpn |
| sonicwall | ssl vpn | cpe:2.3:h:sonicwall:ssl_vpn |
| stonesoft | stonegate | cpe:2.3:h:stonesoft:stonegate |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- aladdin safenet securewire access gatewayall versions
- cisco adaptive security applianceall versions
- sonicwall e-class ssl vpnall versions
- sonicwall ssl vpnall versions
- stonesoft stonegateall versions
Versions reported by the vendor
Affected version ranges reported by the assigning authority (certcc). Independent of NVD's CPE analysis and usually ahead of it.
Cisco Adaptive Security Appliance Web SSL VPN
- all versionsaffected
Palo Alto PAN OS Web SSL VPN
- all versionsaffected
Same product
cisco: all recordsOther highest-scoring records for the same primary product.
- CVE-2020-3572Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software SSL/TLS Session Denial of Service Vulnerability35Monitor
- CVE-2020-3436Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services File Upload Denial of Service Vulnerability35Monitor
- CVE-2020-3304Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Denial of Service Vulnerability35Monitor
Published before and after this one in the same product
- ← EarlierCVE-2009-1202Jun 25, 2009 · WebVPN on the Cisco Adaptive Security Appliances (ASA) device with software 8.0(4), 8.1.2, and 8.2.1 allows remote attackers to bypass certa18Monitor
- ← EarlierCVE-2009-1203Jun 25, 2009 · WebVPN on the Cisco Adaptive Security Appliances (ASA) device with software 8.0(4), 8.1.2, and 8.2.1 does not properly distinguish its own l25Monitor
- Later →CVE-2010-1578Aug 9, 2010 · Unspecified vulnerability in the SunRPC inspection feature on Cisco Adaptive Security Appliances (ASA) 5500 series devices with software 7.232Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
If successful
- Confidentiality
- P · data can be read
- Integrity
- P · data or configuration can be modified
- Availability
- P · the service can be disrupted
- Attack complexity
- M
- Confidentiality impact
- P
- Integrity impact
- P
- Availability impact
- P
Weakness class (CWE)
CWE-284 · Improper Access ControlCVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:P
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Embedding Scripts within ScriptsCAPEC-19likelihood: High · High
- Malicious Logic InsertionCAPEC-441likelihood: Medium · High
- Modification of Windows Service ConfigurationCAPEC-478likelihood: Low · High
- Malicious Root CertificateCAPEC-479likelihood: Low · Low
- Intent SpoofCAPEC-502
- WebView ExposureCAPEC-503
- Data Injected During ConfigurationCAPEC-536likelihood: Low · High
- Incomplete Data Deletion in a Multi-Tenant EnvironmentCAPEC-546likelihood: Low · Medium
ATT&CK techniques
- RootkitT1014
- Obfuscated Files or Information: Embedded PayloadsT1027.009
- Boot or Logon Initialization ScriptsT1037
- Taint shared contentT1080
- Server Software Component: Terminal Services DLLT1505.005
- Pre-OS Boot:BootkitT1542.003
- Create or Modify System ProcessT1543
- Create or Modify System Process: Launch AgentT1543.001
- Create or Modify System Process:Windows ServiceT1543.003
- Create or Modify System Process: Launch DaemonT1543.004
- Event Triggered Execution:Change Default File AssociationT1546.001
- Event Triggered Execution:.bash_profile and .bashrcT1546.004
- Event Triggered Execution: Accessibility FeaturesT1546.008
- Event Triggered Execution: Installer PackagesT1546.016
- Boot or Logon Autostart ExecutionT1547
- Boot or Logon Autostart Execution:Kernel Modules and ExtensionsT1547.006
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Show all references (19 more)Show less
- www.kb.cert.org/vuls/id/261869
- kb.juniper.net/KB15799
- seclists.org/fulldisclosure/2006/Jun/238
- seclists.org/fulldisclosure/2006/Jun/269
- seclists.org/fulldisclosure/2006/Jun/270
- secunia.com/advisories/37696
- secunia.com/advisories/37786
- secunia.com/advisories/37788
- secunia.com/advisories/37789
- securitytracker.com/id?1023255
- support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&DocumentOID=984744
- www.kb.cert.org/vuls/id/261869
- www.securityfocus.com/archive/1/508164/100/0/threaded
- www.securityfocus.com/bid/37152
- www.sonicwall.com/us/2123_14882.html
- www.sonicwall.com/us/2123_14883.html
- www.stonesoft.com/en/support/security_advisories/2009_03_12.html
- www.vupen.com/english/advisories/2009/3567
- www.vupen.com/english/advisories/2009/3568
Vendor advisories and official records. Exploit/PoC links are deliberately left out.