CVE-2019-1547
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
5.4 Medium
AI Score
Confidence
High
1.9 Low
CVSS2
Access Vector
LOCAL
Access 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
0.001 Low
EPSS
Percentile
18.1%
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).
| CPE | Name | Operator | Version |
|---|---|---|---|
| openssl:openssl | openssl | le | 1.1.1c |
| openssl:openssl | openssl | le | 1.0.2s |
| openssl:openssl | openssl | le | 1.1.0k |
References
lists.opensuse.org/opensuse-security-announce/2019-09/msg00054.html
lists.opensuse.org/opensuse-security-announce/2019-09/msg00072.html
lists.opensuse.org/opensuse-security-announce/2019-10/msg00012.html
lists.opensuse.org/opensuse-security-announce/2019-10/msg00016.html
packetstormsecurity.com/files/154467/Slackware-Security-Advisory-openssl-Updates.html
arxiv.org/abs/1909.01785
git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=21c856b75d81eff61aa63b4f036bb64a85bf6d46
git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=30c22fa8b1d840036b8e203585738df62a03cec8
git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=7c1709c2da5414f5b6133d00a03fc8c5bf996c7a
kc.mcafee.com/corporate/index?page=content&id=SB10365
lists.debian.org/debian-lts-announce/2019/09/msg00026.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GY6SNRJP2S7Y42GIIDO3HXPNMDYN2U3A/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZN4VVQJ3JDCHGIHV4Y2YTXBYQZ6PWQ7E/
seclists.org/bugtraq/2019/Oct/0
seclists.org/bugtraq/2019/Oct/1
seclists.org/bugtraq/2019/Sep/25
security.gentoo.org/glsa/201911-04
security.netapp.com/advisory/ntap-20190919-0002/
security.netapp.com/advisory/ntap-20200122-0002/
security.netapp.com/advisory/ntap-20200416-0003/
support.f5.com/csp/article/K73422160?utm_source=f5support&%3Butm_medium=RSS
usn.ubuntu.com/4376-1/
usn.ubuntu.com/4376-2/
usn.ubuntu.com/4504-1/
www.debian.org/security/2019/dsa-4539
www.debian.org/security/2019/dsa-4540
www.openssl.org/news/secadv/20190910.txt
www.oracle.com/security-alerts/cpuapr2020.html
www.oracle.com/security-alerts/cpujan2020.html
www.oracle.com/security-alerts/cpujul2020.html
www.oracle.com/security-alerts/cpuoct2020.html
www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
www.tenable.com/security/tns-2019-08
www.tenable.com/security/tns-2019-09
Social References
More
Related
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
5.4 Medium
AI Score
Confidence
High
1.9 Low
CVSS2
Access Vector
LOCAL
Access 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
0.001 Low
EPSS
Percentile
18.1%