CVE-2017-8779

Exp

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.

Published: 2017-05-04 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-8779 is rated High Exploit Risk (78.5/100): CVSS High severity, with high exploitation likelihood (EPSS 81.38%, 99th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2017-8779

EDB-ID Source Kind Published Link
41974 exploit_db edb 2017-05-08 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2017-8779

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-17 82.54% 81.38% -1.16%
2 2026-03-04 79.49% 82.54% +3.05%
3 2026-03-01 — 79.49% —

Full EPSS history (48 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-8779

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 6.9 [email protected]

Weakness enumeration for CVE-2017-8779

OS Trackers for CVE-2017-8779

vendor priority summary link
alpine — CVE-2017-8779: 1 source package rows (rpcbind); 10 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 0. https://security.alpinelinux.org/vuln/CVE-2017-8779
debian not yet assigned CVE-2017-8779 not yet assigned priority: Debian including 3 source packages (libtirpc, ntirpc, rpcbind), 15 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 15. https://security-tracker.debian.org/tracker/CVE-2017-8779
gentoo normal CVE-2017-8779: 1 GLSA(s) (201706-07), 2 atom(s) (net-libs/libtirpc, net-nds/rpcbind); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2017-8779
redhat high — https://access.redhat.com/security/cve/CVE-2017-8779
suse high — https://www.suse.com/security/cve/CVE-2017-8779/
ubuntu medium CVE-2017-8779 medium priority: Ubuntu including 3 source packages (libtirpc, ntirpc, rpcbind), 69 status rows across 23 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, precise, questing, trusty, upstream, xenial, yakkety, zesty): not-affected 47, ignored 11, released 7, DNE 2, needed 1, needs-triage 1. https://ubuntu.com/security/CVE-2017-8779

Affected software / configurations for CVE-2017-8779

Vendor Product Version Raw CPE
rpcbind_project rpcbind <= 0.2.4 cpe:2.3:a:rpcbind_project:rpcbind:*:*:*:*:*:*:*:*
libtirpc_project libtirpc <= 1.0.1 cpe:2.3:a:libtirpc_project:libtirpc:*:*:*:*:*:*:*:*
ntirpc_project ntirpc <= 1.4.3 cpe:2.3:a:ntirpc_project:ntirpc:*:*:*:*:*:*:*:*

References for CVE-2017-8779

URL Tags
http://openwall.com/lists/oss-security/2017/05/03/12 Mailing List Patch Third Party Advisory
http://openwall.com/lists/oss-security/2017/05/04/1 Mailing List Patch Third Party Advisory
http://www.debian.org/security/2017/dsa-3845
http://www.securityfocus.com/bid/98325 Third Party Advisory VDB Entry
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 Issue Tracking Patch Third Party Advisory
https://github.com/guidovranken/rpcbomb/ Issue Tracking Patch Third Party Advisory
https://guidovranken.wordpress.com/2017/05/03/rpcbomb-remote-rpcbind-denial-of-service-patches/ Third Party Advisory
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/
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