VDB

CVE-2021-46828

CVE-2021-46828 PUBLISHED CVSS 7.5 HIGH

Reported by mitre · Published July 20, 2022

In libtirpc before 1.3.3rc1, remote attackers could exhaust the file descriptors of a process that uses libtirpc because idle TCP connections are mishandled. This can, in turn, lead to an svc_run infinite loop without accepting new connections.

Fixed versions

Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.

PackageEcosystemFixed in
libtirpclibtirpc_project1.3.3

Risk scores

CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

VendorProductVersions
n/an/an/a
n/an/a*
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP3.1.0
amazon:2023libtirpc0
amazon:2023libtirpc-devel0
alpinelibtirpc0, 0, 0
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP3.1.0
SiemensSIPLUS S7-1500 CPU 1518-4 PN/DP MFP3.1.0

Timeline

  • Jul 20, 2022 CVE Published
  • Jul 20, 2022 EPSS Score (30 in total, the first dated here)
  • Dec 16, 2025 PoC Published
  • Jun 2, 2026 Security Advisory (57 in total, the first dated here)
  • Jul 14, 2026 Coalition ESS Score
  • Oct 13, 2026 Distribution Patch (54 in total, the first dated here)

Query this with the API

The same record, from the CLI:

vulnetix vdb vuln CVE-2021-46828
vulnetix vdb fixes CVE-2021-46828

Or with curl, using the org id and key from your account page:

curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/CVE-2021-46828/fixes/registry"

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References

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