Treck TCP/IP stack Out-of-Bounds Read
CVE-2020-11899 is a medium-severity out-of-bounds read vulnerability in Tcp/ip from Treck, with a CVSS 3.1 base score of 5.4 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. The record lists version 6.0.1.66 as the first without the flaw, so updating Tcp/ip to that release or later removes the exposure. CISA added it to the Known Exploited Vulnerabilities catalogue on March 3, 2022, which means attacks have been observed in the wild.
Attackers are already exploiting this vulnerability, according to CISA.
What to do
- Update Tcp/ip to 6.0.1.66 or a later version.
- CISA's required action: Apply updates per vendor instructions.
- Read the advisory on treck.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Treck | Tcp/ip | before 6.0.1.66 | 6.0.1.66 |
| Dell | Wyse 5050 All-in-one Firmware | Not specified in the record | Not stated |
| Dell | Wyse 7030 Firmware | Not specified in the record | Not stated |
| Dell | Wyse 5030 Firmware | Not specified in the record | Not stated |
Version data comes from NVD's product matching. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- AdjacentThe attacker must be on the same local network segment.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- LowLimited modification of data is possible.
- Availability
- LowPerformance or availability is reduced.
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 5.4 | Medium | NVD |
| CVSS 3.1 | 5.4 | Medium | CISA (ADP) |
| CVSS 2.0 | 4.8 | Medium | NVD |
Official description
The Treck TCP/IP stack before 6.0.1.66 has an IPv6 Out-of-bounds Read.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
How developers prevent this class of flaw
- Use a language that provides appropriate memory abstractions.
Timeline
- CVE record published.
- Added to CISA's Known Exploited Vulnerabilities catalogue.
- Deadline for US federal agencies to remediate, set by CISA.
- CISA published its SSVC assessment (exploitation: active, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Advisories
- treck.comProduct
Patches and release notes
- kb.cert.org/vuls/id/257161/Mitigation, Third Party Advisory, US Government Resource
Third-party and government advisories
- security.netapp.com/advisory/ntap-20200625-0006/Third Party Advisory
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-treck-ip-stack-JyBQ5GyCThird Party Advisory
- dell.com/support/article/de-de/sln321836/dell-response-to-the-ripple20-vulnerabilitiesThird Party Advisory
- intel.com/content/www/us/en/security-center/advisory/intel-sa-00295.htmlThird Party Advisory
- kb.cert.org/vuls/id/257161Third Party Advisory, US Government Resource
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-11899US Government Resource
Other references
- cwe.mitre.org/data/definitions/125.htmlTechnical Description
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