CVE-2017-16803 Denial of service in n/a

What is CVE-2017-16803?

CVE-2017-16803 is a high-severity denial of service vulnerability in Libav Libav, published on 13 Nov 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In Libav through 11.11 and 12.x through 12.1, the smacker_decode_tree function in libavcodec/smacker.c does not properly restrict tree recursion, which allows remote attackers to cause a denial of service (bitstream.c:build_table() out-of-bounds read and application crash) via a crafted Smacker stream.

Weakness: CWE-119

Which versions are affected by CVE-2017-16803?

It affects 1 product.

Products include Libav Libav.

How do I fix CVE-2017-16803?

Apply the vendor's patch.

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-2017-16803 being exploited?

There is no known exploitation of CVE-2017-16803 in the wild and no public exploit code.

Other vulnerabilities in Libav Libav

• CVE-2014-3984 Multiple unspecified vulnerabilities in Libav before 0.8.12 allow remote attackers to have unknown impact and vectors. Critical 10.0
• CVE-2017-9051 Null dereference in n/a Critical 9.8
• CVE-2014-4609 Integer overflow in n/a High 8.8
• CVE-2019-9719 Memory corruption in n/a High 8.8
• CVE-2018-5766 Memory corruption in n/a High 8.8

All Libav Libav vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2017-16803, DSA-4119-1, GHSA-j8rq-pgqm-7hx7, UBUNTU-CVE-2017-16803.