A cache-related side channel vulnerability was found in nettle which might allow an attacker to obtain sensitive information.
Package | dev-libs/nettle on all architectures |
---|---|
Affected versions | < 3.2-r1 |
Unaffected versions | >= 3.2-r1 |
Nettle is a cryptographic library that is designed to fit easily in almost any context: In cryptographic toolkits for object-oriented languages, such as C++, Python, or Pike, in applications like lsh or GnuPG, or even in kernel space.
It was found that nettle’s RSA and DSA decryption code was vulnerable to cache-related side channel attacks.
See the referenced technical paper “Cache Attacks Enable Bulk Key Recovery on the Cloud” below for details.
An attacker could recover the private key from a co-located virtual-machine instance.
There is no known workaround at this time.
All nettle users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=dev-libs/nettle-3.2-r1"
Release date
June 22, 2017
Latest revision
June 22, 2017: 1
Severity
normal
Exploitable
local, remote
Bugzilla entries