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HTTP\u002F2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.","2023-10-10",7.5,"v3.1","High",0.99999,{"cveId":405,"description":406,"publishedDate":407,"cvssScore":400,"cvssVersion":401,"severity":402,"isKev":17,"epssScore":408},"CVE-2024-31309","HTTP\u002F2 CONTINUATION DoS attack can cause Apache Traffic Server to consume more resources on the server.  Version from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.3 are affected.\n\nUsers can set a new setting (proxy.config.http2.max_continuation_frames_per_minute) to limit the number of CONTINUATION frames per minute.  ATS does have a fixed amount of memory a request can use and ATS adheres to these limits in previous releases.\nUsers are recommended to upgrade to versions 8.1.10 or 9.2.4 which fixes the issue.","2024-04-10",0.94615,{"cveId":410,"description":411,"publishedDate":412,"cvssScore":400,"cvssVersion":401,"severity":402,"isKev":17,"epssScore":413},"CVE-2019-9515","Some HTTP\u002F2 implementations are vulnerable to a settings flood, potentially leading to a denial of service. The attacker sends a stream of SETTINGS frames to the peer. Since the RFC requires that the peer reply with one acknowledgement per SETTINGS frame, an empty SETTINGS frame is almost equivalent in behavior to a ping. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.","2019-08-13",0.87399,{"cveId":415,"description":416,"publishedDate":412,"cvssScore":400,"cvssVersion":401,"severity":402,"isKev":17,"epssScore":417},"CVE-2019-9512","Some HTTP\u002F2 implementations are vulnerable to ping floods, potentially leading to a denial of service. The attacker sends continual pings to an HTTP\u002F2 peer, causing the peer to build an internal queue of responses. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.",0.83433,{"cveId":419,"description":420,"publishedDate":412,"cvssScore":400,"cvssVersion":401,"severity":402,"isKev":17,"epssScore":421},"CVE-2019-9514","Some HTTP\u002F2 implementations are vulnerable to a reset flood, potentially leading to a denial of service. The attacker opens a number of streams and sends an invalid request over each stream that should solicit a stream of RST_STREAM frames from the peer. Depending on how the peer queues the RST_STREAM frames, this can consume excess memory, CPU, or both.",0.82813,{"cveId":423,"description":424,"publishedDate":412,"cvssScore":400,"cvssVersion":401,"severity":402,"isKev":17,"epssScore":425},"CVE-2019-9513","Some HTTP\u002F2 implementations are vulnerable to resource loops, potentially leading to a denial of service. The attacker creates multiple request streams and continually shuffles the priority of the streams in a way that causes substantial churn to the priority tree. This can consume excess CPU.",0.81556,{"cveId":427,"description":428,"publishedDate":429,"cvssScore":400,"cvssVersion":401,"severity":402,"isKev":17,"epssScore":430},"CVE-2023-39456","Improper Input Validation vulnerability in Apache Traffic Server with malformed HTTP\u002F2 frames.This issue affects Apache Traffic Server: from 9.0.0 through 9.2.2.\n\nUsers are recommended to upgrade to version 9.2.3, which fixes the issue.","2023-10-17",0.60538,{"cveId":432,"description":433,"publishedDate":412,"cvssScore":400,"cvssVersion":401,"severity":402,"isKev":17,"epssScore":434},"CVE-2019-9511","Some HTTP\u002F2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.",0.59547,{"cveId":436,"description":437,"publishedDate":412,"cvssScore":438,"cvssVersion":401,"severity":439,"isKev":17,"epssScore":440},"CVE-2019-9516","Some HTTP\u002F2 implementations are vulnerable to a header leak, potentially leading to a denial of service. The attacker sends a stream of headers with a 0-length header name and 0-length header value, optionally Huffman encoded into 1-byte or greater headers. Some implementations allocate memory for these headers and keep the allocation alive until the session dies. This can consume excess memory.",6.5,"Medium",0.56262,{"cveId":442,"description":443,"publishedDate":412,"cvssScore":400,"cvssVersion":401,"severity":402,"isKev":17,"epssScore":444},"CVE-2019-9517","Some HTTP\u002F2 implementations are vulnerable to unconstrained interal data buffering, potentially leading to a denial of service. The attacker opens the HTTP\u002F2 window so the peer can send without constraint; however, they leave the TCP window closed so the peer cannot actually write (many of) the bytes on the wire. The attacker then sends a stream of requests for a large response object. Depending on how the servers queue the responses, this can consume excess memory, CPU, or both.",0.2789,[446],{"cveId":397,"description":398,"publishedDate":399,"cvssScore":400,"severity":402,"isKev":4,"epssScore":403,"cisaVulnName":447,"cisaDateAdded":399,"cisaShortDescription":448,"cisaRequiredAction":449},"HTTP\u002F2 Rapid Reset Attack Vulnerability","HTTP\u002F2 contains a rapid reset vulnerability that allows for a distributed denial-of-service attack (DDoS).","Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",{"title":451,"metaDescription":452,"keywords":453,"structuredData":454},"Traffic Server by Apache - Security Vulnerabilities & Analysis | Precursor Intelligence","Comprehensive security analysis for Traffic Server by Apache covering 125 versions with 80 tracked vulnerabilities including 0 critical and 1 high-severity issues and 1 CISA KEV vulnerability. Real-time threat intelligence, CVE tracking, and security recommendations.","Traffic Server vulnerabilities, Traffic Server security, Traffic Server CVE, Apache Traffic Server, Traffic Server threat intelligence, Apache security, product security analysis, cybersecurity threats, vulnerability management, CVE tracking, Traffic Server KEV, Traffic Server exploited vulnerabilities",{"@context":455,"@type":456,"name":457,"description":452,"url":458,"manufacturer":459,"applicationCategory":463,"softwareVersion":464,"mainEntity":465},"https:\u002F\u002Fschema.org","SoftwareApplication","Traffic Server","https:\u002F\u002Fprecursorintelligence.com\u002Fvulnerabilities\u002Ftechnologies\u002Fvendors\u002Fapache\u002Ftraffic_server",{"@type":460,"name":461,"url":462},"Organization","Apache","https:\u002F\u002Fprecursorintelligence.com\u002Fvendors\u002Fapache","Security Software","125 versions tracked",{"@type":466,"name":467,"description":468,"vulnerabilityCount":10,"dateModified":12},"SecurityVulnerability","Traffic Server Security Vulnerabilities","Security vulnerabilities affecting Traffic Server by Apache",{"totalVersions":9,"totalVulnerabilities":10,"kevVulnerabilities":11,"lastUpdated":12,"generatedAt":470,"apiVersion":471},"2026-10-17T16:16:17.248Z","3.0",[],{"rows":474,"total":11,"capped":17,"failed":16},[475],{"cveId":397,"name":447,"severity":402,"cvss":400,"added":399,"epss":403,"published":476,"ranges":477,"checked":4,"hits":480,"covers":17},"2023-10-10T14:15:10.883",[478,479],"8.0.0 to before 8.1.9","9.0.0 to before 9.2.3",[]]