CVE-2016-9939 Denial of service in n/a
An attacker can cause a denial of service by triggering a noticeable delay during memory wiping in the ASN.1 BER decoding routine.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-9939?
CVE-2016-9939 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 30 Jan 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Crypto++ (aka cryptopp and libcrypto++) 5.6.4 contained a bug in its ASN.1 BER decoding routine. The library will allocate a memory block based on the length field of the ASN.1 object. If there is not enough content octets in the ASN.1 object, then the function will fail and the memory block will be zeroed even if its unused. There is a noticeable delay during the wipe for a large allocation.
Weakness: CWE-20
Which versions are affected by CVE-2016-9939?
It affects 2 products.
Linux distribution packages (3)
libcryptopp SUSE:Linux Enterprise Module for Basesystem 15 SP2 | All versions | 5.6.5-1.6.1 |
libcryptopp SUSE:Linux Enterprise Module for Basesystem 15 SP3 | All versions | 5.6.5-1.6.1 |
libcryptopp openSUSE:Leap 15.3 | All versions | 5.6.5-1.6.1 |
Products include Cryptopp Crypto\+\+, Debian Debian Linux.
How do I fix CVE-2016-9939?
Upgrade to a fixed version.
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-2016-9939 being exploited?
There is no known exploitation of CVE-2016-9939 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2016-9939, DLA-766-1, DSA-3748-1, GHSA-x7wj-9rr2-gfcg, MGASA-2017-0010, SUSE-SU-2021:3301-1 and 2 more.