CVE-2017-8779 EXPLOIT
7.5
HIGH · CVSS 3.0 · EPSS 81.2% (pctl 100)
Patch early
A public exploit exists.
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.
Scoring
| CVSS | 7.5 (HIGH, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| EPSS | 81.23% — more likely to be exploited than 100% of all CVEs |
| Weakness | CWE-770 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2017-05-04 |
| Last modified | 2026-06-17 |
Affected (3)
| Vendor | Product |
|---|---|
| libtirpc project | libtirpc |
| ntirpc project | ntirpc |
| rpcbind project | rpcbind |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | RPCBind / libtirpc - Denial of Service | 2017-05-08 |
References
- http://openwall.com/lists/oss-security/2017/05/03/12
- http://openwall.com/lists/oss-security/2017/05/04/1
- http://www.debian.org/security/2017/dsa-3845
- http://www.securityfocus.com/bid/98325
- http://www.securitytracker.com/id/1038532
- https://access.redhat.com/errata/RHBA-2017:1497
- https://access.redhat.com/errata/RHSA-2017:1262
- https://access.redhat.com/errata/RHSA-2017:1263
- https://access.redhat.com/errata/RHSA-2017:1267
- https://access.redhat.com/errata/RHSA-2017:1268
- https://access.redhat.com/errata/RHSA-2017:1395
- https://github.com/drbothen/GO-RPCBOMB
- https://github.com/guidovranken/rpcbomb/
- https://guidovranken.wordpress.com/2017/05/03/rpcbomb-remote-rpcbind-denial-of-service-patches/
- https://security.gentoo.org/glsa/201706-07
- https://security.netapp.com/advisory/ntap-20180109-0001/
- https://usn.ubuntu.com/3759-1/
- https://usn.ubuntu.com/3759-2/
- https://www.exploit-db.com/exploits/41974/
- http://openwall.com/lists/oss-security/2017/05/03/12
→ the Explorer · watch your stack · NVD