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CVE-2016-9939

Published: 30 January 2017

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.

Priority

Low

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
libcrypto++
Launchpad, Ubuntu, Debian
artful Not vulnerable
(5.6.4-5)
bionic Not vulnerable
(5.6.4-5)
precise Ignored
(end of life)
trusty
Released (5.6.1-6+deb8u3build0.14.04.1)
upstream
Released (5.6.4-5)
xenial
Released (5.6.1-9ubuntu0.1)
yakkety Ignored
(end of life)
zesty Not vulnerable
(5.6.4-5)

Severity score breakdown

Parameter Value
Base score 7.5
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