CVE-2016-9939
Publication date 30 January 2017
Last updated 25 August 2025
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| libcrypto++ | 18.04 LTS bionic |
Not affected
|
| 16.04 LTS xenial |
Fixed 5.6.1-9ubuntu0.1
|
|
| 14.04 LTS trusty |
Fixed 5.6.1-6+deb8u3build0.14.04.1
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.5 · High
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |