FKIE_CVE-2021-32846

Vulnerability from fkie_nvd - Published: 2023-02-17 23:15 - Updated: 2024-11-21 06:07
Severity ?
7.7 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107, function `pci_vtsock_proc_tx` in `virtio-sock` can lead to to uninitialized memory use. In this situation, there is a check for the return value to be less or equal to `VTSOCK_MAXSEGS`, but that check is not sufficient because the function can return `-1` if it finds an error it cannot recover from. Moreover, the negative return value will be used by `iovec_pull` in a while condition that can further lead to more corruption because the function is not designed to handle a negative `iov_len`. This issue may lead to a guest crashing the host causing a denial of service and, under certain circumstance, memory corruption. This issue is fixed in commit af5eba2360a7351c08dfd9767d9be863a50ebaba.
References
security-advisories@github.comhttps://github.com/moby/hyperkit/commit/af5eba2360a7351c08dfd9767d9be863a50ebabaPatch
security-advisories@github.comhttps://github.com/moby/hyperkit/pull/313Patch
security-advisories@github.comhttps://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/moby/hyperkit/commit/af5eba2360a7351c08dfd9767d9be863a50ebabaPatch
af854a3a-2127-422b-91ae-364da2661108https://github.com/moby/hyperkit/pull/313Patch
af854a3a-2127-422b-91ae-364da2661108https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/Third Party Advisory
Impacted products
Vendor Product Version
mobyproject hyperkit *
To clipboard 

{
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    {
      "nodes": [
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              "criteria": "cpe:2.3:a:mobyproject:hyperkit:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "0AE32831-24E2-44FD-939C-E6F799A5D632",
              "versionEndIncluding": "0.20210107",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107, function `pci_vtsock_proc_tx` in `virtio-sock` can lead to to uninitialized memory use. In this situation, there is a check for the return value to be less or equal to `VTSOCK_MAXSEGS`, but that check is not sufficient because the function can return `-1` if it finds an error it cannot recover from. Moreover, the negative return value will be used by `iovec_pull` in a while condition that can further lead to more corruption because the function is not designed to handle a negative `iov_len`. This issue may lead to a guest crashing the host causing a denial of service and, under certain circumstance, memory corruption. This issue is fixed in commit af5eba2360a7351c08dfd9767d9be863a50ebaba."
    }
  ],
  "id": "CVE-2021-32846",
  "lastModified": "2024-11-21T06:07:52.353",
  "metrics": {
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          "attackComplexity": "LOW",
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          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
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  "vulnStatus": "Modified",
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      "type": "Secondary"
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}


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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.