CVE-2017-8779

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 81.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2017-05-04 · updated 2026-06-17
Weakness: CWE-770

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.

Affected products

[UNKNOWN] libtirpc: through 1.0.1
Ntirpc Project Ntirpc: through 1.4.3
rpcbind: through 0.2.4

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

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