CVE-2018-20187

Name
CVE-2018-20187
Description
A side-channel issue was discovered in Botan before 2.9.0. An attacker capable of precisely measuring the time taken for ECC key generation may be able to derive information about the high bits of the secret key, as the function to derive the public point from the secret scalar uses an unblinded Montgomery ladder whose loop iteration count depends on the bitlength of the secret. This issue affects only key generation, not ECDSA signatures or ECDH key agreement.
NVD Severity
medium
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
Not Applicable https://github.com/crocs-muni/ECTester
Vendor Advisory https://botan.randombit.net/security.html
Release Notes https://botan.randombit.net/news.html

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:botan_project:botan:*:*:*:*:*:*:*:* botan >= None < 2.9.0

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
botan edge-main 2.9.0-r0 None fixed
botan edge-main 2.7.0-r0 None possibly vulnerable
botan edge-main 2.6.0-r0 None possibly vulnerable
botan edge-main 2.5.0-r0 None possibly vulnerable
botan 3.21-main 2.9.0-r0 None fixed
botan 3.21-main 2.7.0-r0 None possibly vulnerable
botan 3.21-main 2.6.0-r0 None possibly vulnerable
botan 3.21-main 2.5.0-r0 None possibly vulnerable
botan 3.20-main 2.9.0-r0 None fixed
botan 3.20-main 2.7.0-r0 None possibly vulnerable
botan 3.20-main 2.6.0-r0 None possibly vulnerable
botan 3.20-main 2.5.0-r0 None possibly vulnerable
botan 3.19-main 2.9.0-r0 None fixed
botan 3.19-main 2.7.0-r0 None possibly vulnerable
botan 3.19-main 2.6.0-r0 None possibly vulnerable
botan 3.19-main 2.5.0-r0 None possibly vulnerable
botan 3.18-main 2.9.0-r0 None fixed
botan 3.17-main 2.9.0-r0 None fixed
botan 3.12-main 2.9.0-r0 None fixed
botan 3.11-main 2.9.0-r0 None fixed