CVE-2019-1547
Published: 10 September 2019
Normally in OpenSSL EC groups always have a co-factor present and this is used in side channel resistant code paths. However, in some cases, it is possible to construct a group using explicit parameters (instead of using a named curve). In those cases it is possible that such a group does not have the cofactor present. This can occur even where all the parameters match a known named curve. If such a curve is used then OpenSSL falls back to non-side channel resistant code paths which may result in full key recovery during an ECDSA signature operation. In order to be vulnerable an attacker would have to have the ability to time the creation of a large number of signatures where explicit parameters with no co-factor present are in use by an application using libcrypto. For the avoidance of doubt libssl is not vulnerable because explicit parameters are never used. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).
Notes
Author | Note |
---|---|
mdeslaur | code isn't compiled into edk2 |
Priority
Status
Package | Release | Status |
---|---|---|
edk2 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not built)
|
disco |
Not vulnerable
(code not built)
|
|
eoan |
Not vulnerable
(code not built)
|
|
focal |
Not vulnerable
(code not built)
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Not vulnerable
(code not built)
|
|
nodejs Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(uses system openssl1.0)
|
disco |
Not vulnerable
(uses system openssl1.1)
|
|
eoan |
Not vulnerable
(uses system openssl1.1)
|
|
focal |
Not vulnerable
(uses system openssl1.1)
|
|
trusty |
Not vulnerable
(uses system openssl)
|
|
upstream |
Needs triage
|
|
xenial |
Not vulnerable
(uses system openssl)
|
|
openssl Launchpad, Ubuntu, Debian |
bionic |
Released
(1.1.1-1ubuntu2.1~18.04.6)
|
disco |
Ignored
(reached end-of-life)
|
|
eoan |
Released
(1.1.1c-1ubuntu4.1)
|
|
focal |
Released
(1.1.1d-2ubuntu1)
|
|
trusty |
Released
(1.0.1f-1ubuntu2.27+esm1)
|
|
upstream |
Released
(1.1.1d)
|
|
xenial |
Released
(1.0.2g-1ubuntu4.16)
|
|
Patches: upstream: https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=21c856b75d81eff61aa63b4f036bb64a85bf6d46 (1.0.2) upstream: https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=7c1709c2da5414f5b6133d00a03fc8c5bf996c7a (1.1.0) upstream: https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=30c22fa8b1d840036b8e203585738df62a03cec8 (1.1.1) |
||
openssl1.0 Launchpad, Ubuntu, Debian |
bionic |
Released
(1.0.2n-1ubuntu5.4)
|
disco |
Does not exist
|
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 4.7 |
Attack vector | Local |
Attack complexity | High |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |