CVE-2019-12255

EPSS 75.3%◆ VulnCheck KEV

Vexday Risk Score

67High priority

SSVC decision (CISA)

Act

Exploitation + impact → act immediately

Exploit maturity

Proof of concept

Popular PoC on GitHub (19 stars) — exploitation code widely available.

CVSS —EPSS 75.3%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

09 Aug 2019Published on NVD

12 Aug 2019Public PoC

Weaponization speed

2 daysto first PoC

Weaponized quickly — attackers prioritized this vulnerability. Patch urgently.

Recommendation: Patch as soon as possible — active exploitation confirmed.

Wind River VxWorks has a Buffer Overflow in the TCP component (issue 1 of 4). This is a IPNET security vulnerability: TCP Urgent Pointer = 0 that leads to an integer underflow.

Affected products

n/a · n/a

public PoCs found — 3

githubgithub.com/sud0woodo/Urgent11-Suricata-LUA-scripts★ 19 cve_referencepacketstormsecurity.com/files/154022/VxWorks-6.8-Integer-Underflow.htmlunverified exploitdbwww.exploit-db.com/exploits/47233unverified

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

References

http://packetstormsecurity.com/files/154022/VxWorks-6.8-Integer-Underflow.html https://cert-portal.siemens.com/productcert/pdf/ssa-189842.pdf https://cert-portal.siemens.com/productcert/pdf/ssa-352504.pdf https://cert-portal.siemens.com/productcert/pdf/ssa-632562.pdf https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0009 https://security.netapp.com/advisory/ntap-20190802-0001/https://support2.windriver.com/index.php?page=cve&on=view&id=CVE-2019-12255 https://support2.windriver.com/index.php?page=security-notices https://support.f5.com/csp/article/K41190253 https://support.f5.com/csp/article/K41190253?utm_source=f5support&amp%3Butm_medium=RSS https://www.windriver.com/security/announcements/tcp-ip-network-stack-ipnet-urgent11/