x/vulndb: potential Go vuln in github.com/moby/hyperkit: CVE-2021-32846

[GoVulnBot]

CVE-2021-32846 references github.com/moby/hyperkit, which may be a Go module.

Description:
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:

• NIST: https://nvd.nist.gov/vuln/detail/CVE-2021-32846
• JSON: https://github.com/CVEProject/cvelist/tree/b7ffa4a308cf13c41ec8ffb73ca0a97fe700ec8b/2021/32xxx/CVE-2021-32846.json
• advisory: https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/
• fix: Various fixes moby/hyperkit#313
• fix: moby/hyperkit@af5eba2
• Imported by: https://pkg.go.dev/github.com/moby/hyperkit?tab=importedby

Cross references:
No existing reports found with this module or alias.

See doc/triage.md for instructions on how to triage this report.

modules:
  - module: github.com/moby/hyperkit
    packages:
      - package: hyperkit
description: |
    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.
cves:
  - CVE-2021-32846
references:
  - advisory: https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/
  - fix: https://github.com/moby/hyperkit/pull/313
  - fix: https://github.com/moby/hyperkit/commit/af5eba2360a7351c08dfd9767d9be863a50ebaba

[gopherbot]

Change https://go.dev/cl/471796 mentions this issue: data/excluded: batch add excluded reports