CVE-2020-13934 (GCVE-0-2020-13934)
Vulnerability from cvelistv5 – Published: 2020-07-14 14:59 – Updated: 2024-08-04 12:32
VLAI
EPSS
VEX
Summary
An h2c direct connection to Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M5 to 9.0.36 and 8.5.1 to 8.5.56 did not release the HTTP/1.1 processor after the upgrade to HTTP/2. If a sufficient number of such requests were made, an OutOfMemoryException could occur leading to a denial of service.
Severity
7.5 (High)
CWE
- Denial of Service
Assigner
References
13 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread.html/r61f411cf824… | x_refsource_MISC |
| https://www.debian.org/security/2020/dsa-4727 | vendor-advisoryx_refsource_DEBIAN |
| https://lists.debian.org/debian-lts-announce/2020… | mailing-listx_refsource_MLIST |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://lists.apache.org/thread.html/ra072b1f786e… | mailing-listx_refsource_MLIST |
| https://www.oracle.com/security-alerts/cpuoct2020.html | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2020072… | x_refsource_CONFIRM |
| https://usn.ubuntu.com/4596-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://www.oracle.com/security-alerts/cpujan2021.html | x_refsource_MISC |
| https://www.oracle.com/security-alerts/cpuApr2021.html | x_refsource_MISC |
| https://www.oracle.com//security-alerts/cpujul2021.html | x_refsource_MISC |
| https://www.oracle.com/security-alerts/cpujan2022.html | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| n/a | Apache Tomcat |
Affected:
Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M5 to 9.0.36, 8.5.1 to 8.5.56
|
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"id": "CVE-2020-13934",
"lastModified": "2024-11-21T05:02:10.717",
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"published": "2020-07-14T15:15:11.007",
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"vulnStatus": "Modified",
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"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-08-04T18:22:32+00:00",
"cve": "CVE-2020-13934",
"id": "CVE-2020-13934",
"initial_release_date": "2020-07-15T00:00:00+00:00",
"product_status:fixed": "36",
"product_status:known_affected": "8",
"product_status:known_not_affected": "41",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "tomcat: OutOfMemoryException caused by HTTP/2 connection leak could lead to DoS",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-13934.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-31T02:23:26Z",
"cve": "CVE-2020-13934",
"id": "CVE-2020-13934",
"initial_release_date": "2023-02-15T03:58:11Z",
"product_status:known_affected": "482",
"product_status:known_not_affected": "376",
"product_status:recommended": "544",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2020-13934",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2020-13934.json",
"version": "39"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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