1.9 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:P/I:N/A:N
4.7 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
0.001 Low
EPSS
Percentile
19.7%
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).
Author | Note |
---|---|
mdeslaur | code isn’t compiled into edk2 |
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | openssl | < 1.1.1-1ubuntu2.1~18.04.6 | UNKNOWN |
ubuntu | 19.10 | noarch | openssl | < 1.1.1c-1ubuntu4.1 | UNKNOWN |
ubuntu | 20.04 | noarch | openssl | < 1.1.1d-2ubuntu1 | UNKNOWN |
ubuntu | 14.04 | noarch | openssl | < 1.0.1f-1ubuntu2.27+esm1 | UNKNOWN |
ubuntu | 16.04 | noarch | openssl | < 1.0.2g-1ubuntu4.16 | UNKNOWN |
ubuntu | 18.04 | noarch | openssl1.0 | < 1.0.2n-1ubuntu5.4 | UNKNOWN |
launchpad.net/bugs/cve/CVE-2019-1547
nvd.nist.gov/vuln/detail/CVE-2019-1547
security-tracker.debian.org/tracker/CVE-2019-1547
ubuntu.com/security/notices/USN-4376-1
ubuntu.com/security/notices/USN-4376-2
ubuntu.com/security/notices/USN-4504-1
www.cve.org/CVERecord?id=CVE-2019-1547
www.openssl.org/news/secadv/20190910.txt
1.9 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:P/I:N/A:N
4.7 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
0.001 Low
EPSS
Percentile
19.7%