CVE-2020-17509 : ATS negative cache option is vulnerable to a cache poisoning attack. If you have

ATS negative cache option is vulnerable to a cache poisoning attack. If you have this option enabled, please upgrade or disable this feature. Apache Traffic Server versions 7.0.0 to 7.1.11 and 8.0.0 to 8.1.0 are affected.

Published 2021-01-11 10:15:13

Updated 2021-01-15 17:41:30

Source Apache Software Foundation

View at NVD, CVE.org

Products affected by CVE-2020-17509

Apache » Traffic Server
Versions from including (>=) 7.0.0 and up to, including, (<=) 7.1.10
cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*
Matching versions
Apache » Traffic Server
Versions from including (>=) 6.0.0 and up to, including, (<=) 6.2.3
cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*
Matching versions
Apache » Traffic Server
Versions from including (>=) 8.0.0 and up to, including, (<=) 8.0.7
cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*
Matching versions

Threat overview for CVE-2020-17509

Top countries where our scanners detected CVE-2020-17509

Top open port discovered on systems with this issue 80

IPs affected by CVE-2020-17509 1,207

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2020-17509!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2020-17509

EPSS FAQ

0.25%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 63 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-17509

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.3	MEDIUM	AV:N/AC:M/Au:N/C:N/I:P/A:N	8.6	2.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: High Availability: None

CWE ids for CVE-2020-17509

CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-17509

https://lists.apache.org/thread.html/raa9f0589c26c4d146646425e51e2a33e1457492df9f7ea2019daa6d3%40%3Cannounce.trafficserver.apache.org%3E

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