CVE-2016-7835 Use after free in H2O

What is CVE-2016-7835?

CVE-2016-7835 is a critical use after free vulnerability in Kazuho Oku H2O, published on 9 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Use-after-free vulnerability in H2O allows remote attackers to cause a denial-of-service (DoS) or obtain server certificate private keys and possibly other information.

Weakness: CWE-416

Which versions are affected by CVE-2016-7835?

It affects 2 products.

Products include Dena H2o, H2o Project H2o.

How do I fix CVE-2016-7835?

No fix has been published for CVE-2016-7835 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2016-7835 being exploited?

There is no known exploitation of CVE-2016-7835 in the wild and no public exploit code.

Other vulnerabilities in Kazuho Oku H2O

• CVE-2018-0608 Memory corruption in H2O Critical 9.8
• CVE-2023-30847 H2O vulnerable to read from uninitialized pointer in the reverse proxy handler High 8.2
• CVE-2017-10868 Denial of service in H2O High 7.5
• CVE-2017-10869 Memory corruption in H2O High 7.5
• CVE-2017-10908 Denial of service in H2O High 7.5

Sources

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

Also known as GHSA-p8m4-qhm5-5gm6.