CVE-2011-3486 Denial of service in n/a

What is CVE-2011-3486?

CVE-2011-3486 is a medium-severity denial of service vulnerability in n/a, published on 16 Sep 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Beckhoff TwinCAT 2.11.0.2004 and earlier allows remote attackers to cause a denial of service via a crafted request to UDP port 48899, which triggers an out-of-bounds read.

Weakness: CWE-119

Which versions are affected by CVE-2011-3486?

It affects 1 product.

Products include Beckhoff Twincat.

How do I fix CVE-2011-3486?

No fix has been published for CVE-2011-3486 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2011-3486 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-3486 exists.

Public exploit code: 1 Metasploit module and 1 Exploit-DB entry.

Other vulnerabilities in n/a

• CVE-2019-16871 Auth bypass in n/a Critical 9.8
• CVE-2017-16726 Weak cryptography in Beckhoff TwinCAT Critical 9.1
• CVE-2018-7502 Privilege escalation in Beckhoff TwinCAT PLC products High 7.8
• CVE-2019-5637 Beckhoff TwinCAT Profinet Driver Divide-by-Zero Denial of Service High 7.5
• CVE-2017-16718 Weak cryptography in Beckhoff TwinCAT Medium 5.9

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-74h6-2hgj-rvpx.