CVE-2021-27737 Denial of service in Apache Traffic Server

What is CVE-2021-27737?

CVE-2021-27737 is a high-severity denial of service vulnerability in Apache Traffic Server, published on 14 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Apache Traffic Server 9.0.0 is vulnerable to a remote DOS attack on the experimental Slicer plugin.

Which versions are affected by CVE-2021-27737?

It affects 1 product.

Products include Apache Traffic Server.

How do I fix CVE-2021-27737?

No fix has been published for CVE-2021-27737 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-2021-27737 being exploited?

There is no known exploitation of CVE-2021-27737 in the wild and no public exploit code.

Other vulnerabilities in Apache Traffic Server

• CVE-2014-3525 Other in n/a Critical 10.0
• CVE-2021-43082 heap-buffer-overflow with stats-over-http plugin Critical 9.8
• CVE-2021-35474 Dynamic stack buffer overflow in cachekey plugin Critical 9.8
• CVE-2019-17559 Other in Apache Traffic Server Critical 9.8
• CVE-2019-17565 Other in Apache Traffic Server Critical 9.8

All Apache Traffic Server vulnerabilities

Sources

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

Also known as GHSA-j9pm-x686-vcvp.