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alsa-2020:4743
Vulnerability from osv_almalinux
Published
2020-11-03 12:32
Modified
2020-11-03 19:54
Summary
Moderate: squid:4 security, bug fix, and enhancement update
Details
Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects.
The following packages have been upgraded to a later upstream version: squid (4.11). (BZ#1829467)
Security Fix(es):
-
squid: Improper input validation in request allows for proxy manipulation (CVE-2019-12520)
-
squid: Off-by-one error in addStackElement allows for heap buffer overflow and crash (CVE-2019-12521)
-
squid: Improper input validation in URI processor (CVE-2019-12523)
-
squid: Improper access restriction in url_regex may lead to security bypass (CVE-2019-12524)
-
squid: Heap overflow issue in URN processing (CVE-2019-12526)
-
squid: Information Disclosure issue in FTP Gateway (CVE-2019-12528)
-
squid: Out of bounds read in Proxy-Authorization header causes DoS (CVE-2019-12529)
-
squid: Denial of service in cachemgr.cgi (CVE-2019-12854)
-
squid: Buffer overflow in URI processor (CVE-2019-18676)
-
squid: Cross-Site Request Forgery issue in HTTP Request processing (CVE-2019-18677)
-
squid: HTTP Request Splitting issue in HTTP message processing (CVE-2019-18678)
-
squid: Information Disclosure issue in HTTP Digest Authentication (CVE-2019-18679)
-
squid: Mishandled HTML in the host parameter to cachemgr.cgi results in insecure behaviour (CVE-2019-18860)
-
squid: Improper input validation issues in HTTP Request processing (CVE-2020-8449)
-
squid: Buffer overflow in reverse-proxy configurations (CVE-2020-8450)
-
squid: DoS in TLS handshake (CVE-2020-14058)
-
squid: Request smuggling and poisoning attack against the HTTP cache (CVE-2020-15049)
-
squid: Improper input validation could result in a DoS (CVE-2020-24606)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.
References
{
"affected": [
{
"package": {
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"name": "libecap"
},
"ranges": [
{
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{
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},
{
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}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
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"name": "libecap-devel"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.0.1-2.module_el8.6.0+2741+01592ae8"
}
],
"type": "ECOSYSTEM"
}
]
}
],
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"id": "ALSA-2020:4743",
"modified": "2020-11-03T19:54:15Z",
"published": "2020-11-03T12:32:17Z",
"references": [
{
"type": "ADVISORY",
"url": "https://errata.almalinux.org/8/ALSA-2020-4743.html"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2019-12520"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2019-12521"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2019-12523"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2019-12524"
},
{
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"url": "https://vulners.com/cve/CVE-2019-12526"
},
{
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"url": "https://vulners.com/cve/CVE-2019-12528"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2019-12529"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2019-12854"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2019-18676"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2019-18677"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2019-18678"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2019-18679"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2019-18860"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2020-14058"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2020-15049"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2020-24606"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2020-8449"
},
{
"type": "REPORT",
"url": "https://vulners.com/cve/CVE-2020-8450"
}
],
"related": [
"CVE-2019-12520",
"CVE-2019-12521",
"CVE-2019-12523",
"CVE-2019-12524",
"CVE-2019-12526",
"CVE-2019-12528",
"CVE-2019-12529",
"CVE-2019-12854",
"CVE-2019-18676",
"CVE-2019-18677",
"CVE-2019-18678",
"CVE-2019-18679",
"CVE-2019-18860",
"CVE-2020-8449",
"CVE-2020-8450",
"CVE-2020-14058",
"CVE-2020-15049",
"CVE-2020-24606"
],
"summary": "Moderate: squid:4 security, bug fix, and enhancement update"
}
CVE-2019-12520 (GCVE-0-2019-12520)
Vulnerability from cvelistv5 – Published: 2020-04-15 19:14 – Updated: 2024-08-04 23:24
VLAI
EPSS
VEX
Summary
An issue was discovered in Squid through 4.7 and 5. When receiving a request, Squid checks its cache to see if it can serve up a response. It does this by making a MD5 hash of the absolute URL of the request. If found, it servers the request. The absolute URL can include the decoded UserInfo (username and password) for certain protocols. This decoded info is prepended to the domain. This allows an attacker to provide a username that has special characters to delimit the domain, and treat the rest of the URL as a path or query string. An attacker could first make a request to their domain using an encoded username, then when a request for the target domain comes in that decodes to the exact URL, it will serve the attacker's HTML instead of the real HTML. On Squid servers that also act as reverse proxies, this allows an attacker to gain access to features that only reverse proxies can use, such as ESI.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
8 references
| URL | Tags |
|---|---|
| http://www.squid-cache.org/Versions/v4/ | x_refsource_MISC |
| http://www.squid-cache.org/Versions/v4/changesets/ | x_refsource_MISC |
| https://github.com/squid-cache/squid/commits/v4 | x_refsource_MISC |
| https://gitlab.com/jeriko.one/security/-/blob/mas… | x_refsource_MISC |
| https://www.debian.org/security/2020/dsa-4682 | vendor-advisoryx_refsource_DEBIAN |
| https://lists.debian.org/debian-lts-announce/2020… | mailing-listx_refsource_MLIST |
| https://usn.ubuntu.com/4446-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://security.netapp.com/advisory/ntap-2021020… | x_refsource_CONFIRM |
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CVE-2019-12521 (GCVE-0-2019-12521)
Vulnerability from cvelistv5 – Published: 2020-04-15 18:47 – Updated: 2024-08-04 23:24
VLAI
EPSS
VEX
Summary
An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://gitlab.com/jeriko.one/security/-/blob/mas… | x_refsource_MISC |
| http://www.openwall.com/lists/oss-security/2020/04/23/1 | mailing-listx_refsource_MLIST |
| https://www.debian.org/security/2020/dsa-4682 | vendor-advisoryx_refsource_DEBIAN |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://security.gentoo.org/glsa/202005-05 | vendor-advisoryx_refsource_GENTOO |
| https://usn.ubuntu.com/4356-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://lists.debian.org/debian-lts-announce/2020… | mailing-listx_refsource_MLIST |
| https://security.netapp.com/advisory/ntap-2021020… | x_refsource_CONFIRM |
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CVE-2019-12523 (GCVE-0-2019-12523)
Vulnerability from cvelistv5 – Published: 2019-11-26 16:39 – Updated: 2024-08-04 23:24
VLAI
EPSS
VEX
Summary
An issue was discovered in Squid before 4.9. When handling a URN request, a corresponding HTTP request is made. This HTTP request doesn't go through the access checks that incoming HTTP requests go through. This causes all access checks to be bypassed and allows access to restricted HTTP servers, e.g., an attacker can connect to HTTP servers that only listen on localhost.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
9 references
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|---|---|
| http://lists.opensuse.org/opensuse-security-annou… | x_refsource_CONFIRM |
| http://www.squid-cache.org/Advisories/SQUID-2019_8.txt | x_refsource_CONFIRM |
| https://bugzilla.suse.com/show_bug.cgi?id=1156329 | x_refsource_CONFIRM |
| https://usn.ubuntu.com/4213-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://www.debian.org/security/2020/dsa-4682 | vendor-advisoryx_refsource_DEBIAN |
| https://lists.debian.org/debian-lts-announce/2020… | mailing-listx_refsource_MLIST |
| https://usn.ubuntu.com/4446-1/ | vendor-advisoryx_refsource_UBUNTU |
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CVE-2019-12524 (GCVE-0-2019-12524)
Vulnerability from cvelistv5 – Published: 2020-04-15 18:35 – Updated: 2024-08-04 23:24
VLAI
EPSS
VEX
Summary
An issue was discovered in Squid through 4.7. When handling requests from users, Squid checks its rules to see if the request should be denied. Squid by default comes with rules to block access to the Cache Manager, which serves detailed server information meant for the maintainer. This rule is implemented via url_regex. The handler for url_regex rules URL decodes an incoming request. This allows an attacker to encode their URL to bypass the url_regex check, and gain access to the blocked resource.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://gitlab.com/jeriko.one/security/-/blob/mas… | x_refsource_MISC |
| https://www.debian.org/security/2020/dsa-4682 | vendor-advisoryx_refsource_DEBIAN |
| https://lists.debian.org/debian-lts-announce/2020… | mailing-listx_refsource_MLIST |
| https://usn.ubuntu.com/4446-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://security.netapp.com/advisory/ntap-2021020… | x_refsource_CONFIRM |
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CVE-2019-12526 (GCVE-0-2019-12526)
Vulnerability from cvelistv5 – Published: 2019-11-26 16:41 – Updated: 2024-08-04 23:24
VLAI
EPSS
VEX
Summary
An issue was discovered in Squid before 4.9. URN response handling in Squid suffers from a heap-based buffer overflow. When receiving data from a remote server in response to an URN request, Squid fails to ensure that the response can fit within the buffer. This leads to attacker controlled data overflowing in the heap.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://bugzilla.suse.com/show_bug.cgi?id=1156326 | x_refsource_CONFIRM |
| http://www.squid-cache.org/Advisories/SQUID-2019_7.txt | x_refsource_CONFIRM |
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CVE-2019-12528 (GCVE-0-2019-12528)
Vulnerability from cvelistv5 – Published: 2020-02-04 20:07 – Updated: 2024-08-04 23:24
VLAI
EPSS
VEX
Summary
An issue was discovered in Squid before 4.10. It allows a crafted FTP server to trigger disclosure of sensitive information from heap memory, such as information associated with other users' sessions or non-Squid processes.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
10 references
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|---|---|
| http://www.squid-cache.org/Advisories/SQUID-2020_2.txt | x_refsource_CONFIRM |
| https://usn.ubuntu.com/4289-1/ | vendor-advisoryx_refsource_UBUNTU |
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| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://www.debian.org/security/2020/dsa-4682 | vendor-advisoryx_refsource_DEBIAN |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
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CVE-2019-12529 (GCVE-0-2019-12529)
Vulnerability from cvelistv5 – Published: 2019-07-11 18:33 – Updated: 2024-08-04 23:24
VLAI
EPSS
VEX
Summary
An issue was discovered in Squid 2.x through 2.7.STABLE9, 3.x through 3.5.28, and 4.x through 4.7. When Squid is configured to use Basic Authentication, the Proxy-Authorization header is parsed via uudecode. uudecode determines how many bytes will be decoded by iterating over the input and checking its table. The length is then used to start decoding the string. There are no checks to ensure that the length it calculates isn't greater than the input buffer. This leads to adjacent memory being decoded as well. An attacker would not be able to retrieve the decoded data unless the Squid maintainer had configured the display of usernames on error pages.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
12 references
| URL | Tags |
|---|---|
| http://www.squid-cache.org/Versions/v4/changesets/ | x_refsource_CONFIRM |
| https://github.com/squid-cache/squid/commits/v4 | x_refsource_CONFIRM |
| http://www.squid-cache.org/Versions/v4/changesets… | x_refsource_CONFIRM |
| https://usn.ubuntu.com/4065-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://lists.debian.org/debian-lts-announce/2019… | mailing-listx_refsource_MLIST |
| https://usn.ubuntu.com/4065-2/ | vendor-advisoryx_refsource_UBUNTU |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://www.debian.org/security/2019/dsa-4507 | vendor-advisoryx_refsource_DEBIAN |
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Date Public
2019-06-19 00:00
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CVE-2019-12854 (GCVE-0-2019-12854)
Vulnerability from cvelistv5 – Published: 2019-08-15 16:15 – Updated: 2024-08-04 23:32
VLAI
EPSS
VEX
Summary
Due to incorrect string termination, Squid cachemgr.cgi 4.0 through 4.7 may access unallocated memory. On systems with memory access protections, this can cause the CGI process to terminate unexpectedly, resulting in a denial of service for all clients using it.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
9 references
| URL | Tags |
|---|---|
| http://www.squid-cache.org/Advisories/SQUID-2019_1.txt | x_refsource_MISC |
| https://bugs.squid-cache.org/show_bug.cgi?id=4937 | x_refsource_MISC |
| http://www.squid-cache.org/Versions/v4/changesets… | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | x_refsource_CONFIRM |
| https://www.debian.org/security/2019/dsa-4507 | vendor-advisoryx_refsource_DEBIAN |
| https://seclists.org/bugtraq/2019/Aug/42 | mailing-listx_refsource_BUGTRAQ |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://usn.ubuntu.com/4213-1/ | vendor-advisoryx_refsource_UBUNTU |
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CVE-2019-18676 (GCVE-0-2019-18676)
Vulnerability from cvelistv5 – Published: 2019-11-26 16:23 – Updated: 2024-08-05 01:54
VLAI
EPSS
VEX
Summary
An issue was discovered in Squid 3.x and 4.x through 4.8. Due to incorrect input validation, there is a heap-based buffer overflow that can result in Denial of Service to all clients using the proxy. Severity is high due to this vulnerability occurring before normal security checks; any remote client that can reach the proxy port can trivially perform the attack via a crafted URI scheme.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
10 references
| URL | Tags |
|---|---|
| https://github.com/squid-cache/squid/pull/275 | x_refsource_MISC |
| http://www.squid-cache.org/Advisories/SQUID-2019_8.txt | x_refsource_CONFIRM |
| https://bugzilla.suse.com/show_bug.cgi?id=1156329 | x_refsource_CONFIRM |
| http://www.squid-cache.org/Versions/v4/changesets… | x_refsource_CONFIRM |
| https://usn.ubuntu.com/4213-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://www.debian.org/security/2020/dsa-4682 | vendor-advisoryx_refsource_DEBIAN |
| https://lists.debian.org/debian-lts-announce/2020… | mailing-listx_refsource_MLIST |
| https://usn.ubuntu.com/4446-1/ | vendor-advisoryx_refsource_UBUNTU |
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CVE-2019-18677 (GCVE-0-2019-18677)
Vulnerability from cvelistv5 – Published: 2019-11-26 16:21 – Updated: 2024-08-05 01:54
VLAI
EPSS
VEX
Summary
An issue was discovered in Squid 3.x and 4.x through 4.8 when the append_domain setting is used (because the appended characters do not properly interact with hostname length restrictions). Due to incorrect message processing, it can inappropriately redirect traffic to origins it should not be delivered to.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
11 references
| URL | Tags |
|---|---|
| https://github.com/squid-cache/squid/pull/427 | x_refsource_MISC |
| https://bugzilla.suse.com/show_bug.cgi?id=1156328 | x_refsource_CONFIRM |
| http://www.squid-cache.org/Advisories/SQUID-2019_9.txt | x_refsource_CONFIRM |
| http://www.squid-cache.org/Versions/v4/changesets… | x_refsource_CONFIRM |
| http://www.squid-cache.org/Versions/v3/3.5/change… | x_refsource_CONFIRM |
| https://usn.ubuntu.com/4213-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.debian.org/debian-lts-announce/2019… | mailing-listx_refsource_MLIST |
| https://www.debian.org/security/2020/dsa-4682 | vendor-advisoryx_refsource_DEBIAN |
| https://lists.debian.org/debian-lts-announce/2020… | mailing-listx_refsource_MLIST |
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"url": "https://www.debian.org/security/2020/dsa-4682"
},
{
"name": "[debian-lts-announce] 20200710 [SECURITY] [DLA 2278-1] squid3 security update",
"refsource": "MLIST",
"url": "https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2019-18677",
"datePublished": "2019-11-26T16:21:59.000Z",
"dateReserved": "2019-11-04T00:00:00.000Z",
"dateUpdated": "2024-08-05T01:54:14.540Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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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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