CVE-2017-8779

EPSS 81.9%

Vexday Risk Score

60Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

Exploit maturity

Functional exploit

Popular PoC on GitHub (4 stars) — exploitation code widely available.

CVSS —EPSS 81.9%KEV nãoPoC públicaNuclei —Metasploit simPatch referenciado

Lifecycle

04 May 2017Published on NVD

08 May 2017Public PoC

Weaponization speed

3 daysto first PoC

Weaponized quickly — attackers prioritized this vulnerability. Patch urgently.

Recommendation: Plan a near-term fix — a public PoC already exists.

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

n/a · n/a

public PoCs found — 3

githubgithub.com/drbothen/GO-RPCBOMB★ 4 cve_referencewww.exploit-db.com/exploits/41974/unverified exploitdbwww.exploit-db.com/exploits/41974unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

References

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/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