Vulnerability-Lookup

FKIE_CVE-2020-15693

Vulnerability from fkie_nvd - Published: 2020-08-14 19:15 - Updated: 2026-06-17 02:57

Severity

6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Summary

In Nim 1.2.4, the standard library httpClient is vulnerable to a CR-LF injection in the target URL. An injection is possible if the attacker controls any part of the URL provided in a call (such as httpClient.get or httpClient.post), the User-Agent header value, or custom HTTP header names or values.

References

URL	Tags
cve@mitre.org	http://www.openwall.com/lists/oss-security/2021/02/04/2	Exploit, Mailing List, Third Party Advisory
cve@mitre.org	https://consensys.net/diligence/vulnerabilities/nim-httpclient-header-crlf-injection/	Exploit, Third Party Advisory
cve@mitre.org	https://github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/httpclient.nim#L1023	Patch, Third Party Advisory
cve@mitre.org	https://nim-lang.org/blog/2020/07/30/versions-126-and-108-released.html	Release Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2021/02/04/2	Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://consensys.net/diligence/vulnerabilities/nim-httpclient-header-crlf-injection/	Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/httpclient.nim#L1023	Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://nim-lang.org/blog/2020/07/30/versions-126-and-108-released.html	Release Notes, Third Party Advisory

Impacted products

	Vendor	Product	Version
	nim-lang	nim	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
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              "status": "affected",
              "version": "n/a"
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      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
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              "matchCriteriaId": "1DBCD9F0-7A6D-4479-948B-7B2F7B80FBF1",
              "versionEndIncluding": "1.2.6",
              "vulnerable": true
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Nim 1.2.4, the standard library httpClient is vulnerable to a CR-LF injection in the target URL. An injection is possible if the attacker controls any part of the URL provided in a call (such as httpClient.get or httpClient.post), the User-Agent header value, or custom HTTP header names or values."
    },
    {
      "lang": "es",
      "value": "En Nim versi\u00f3n 1.2.4, la biblioteca est\u00e1ndar httpClient es vulnerable a una inyecci\u00f3n CR-LF en la URL objetivo. Es posible una inyecci\u00f3n si el atacante controla cualquier parte de la URL proporcionada en una llamada (tales como httpClient.get o httpClient.post), el valor del encabezado User-Agent o los nombres o valores de encabezado HTTP personalizados."
    }
  ],
  "id": "CVE-2020-15693",
  "lastModified": "2026-06-17T02:57:03.820",
  "metrics": {
    "cvssMetricV2": [
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        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
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          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 6.4,
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          "integrityImpact": "PARTIAL",
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          "confidentialityImpact": "LOW",
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          "scope": "UNCHANGED",
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    },
    {
      "source": "cve@mitre.org",
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    },
    {
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  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-74"
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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  ]
}

CVE-2020-15693 (GCVE-0-2020-15693)

Vulnerability from cvelistv5 – Published: 2020-08-14 18:47 – Updated: 2024-08-04 13:22

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

4 references

URL	Tags
https://github.com/nim-lang/Nim/blob/dc5a40f3f39c…	x_refsource_MISC
https://nim-lang.org/blog/2020/07/30/versions-126…	x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2021/02/04/2	mailing-listx_refsource_MLIST
https://consensys.net/diligence/vulnerabilities/n…	x_refsource_MISC

Date Public

2020-07-30 00:00

Show details on NVD website

JSON

To clipboard

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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.

Detection rules are retrieved from Rulezet.

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.

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.