CVE-2018-0732
High
Description
During key agreement in a TLS handshake using a DH(E) based ciphersuite a malicious server can send a very large prime value to the client. This will cause the client to spend an unreasonably long period of time generating a key for this prime resulting in a hang until the client has finished. This could be exploited in a Denial Of Service attack. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o).
SeverityHigh
CVSS7.5
Exploit probability99. percentile47%
Product
Openssl
PublishedJun 12, 2018
First seenJun 12, 2018
How to fix
Update
- nodejs node.js6.8.1, 6.14.4, 8.8.1, 8.11.4, 10.9.0 or later
Vendor advisories
- debian.org/security/2018/dsa-4355
- access.redhat.com/errata/RHSA-2018:2552
- security.gentoo.org/glsa/201811-03
- usn.ubuntu.com/3692-2/
- access.redhat.com/errata/RHSA-2018:2553
- access.redhat.com/errata/RHSA-2018:3505
- usn.ubuntu.com/3692-1/
- access.redhat.com/errata/RHSA-2018:3221
- debian.org/security/2018/dsa-4348
- access.redhat.com/errata/RHSA-2019:1297
- access.redhat.com/errata/RHSA-2019:1296
- access.redhat.com/errata/RHSA-2019:1543
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openssl openssl | 1.0.2 ≤ v ≤ 1.0.2o, 1.1.0 ≤ v ≤ 1.1.0h | — |
| canonical ubuntu_linux | 12.04, 14.04, 16.04, 17.10, 18.04 | — |
| debian debian_linux | 8.0 | — |
| nodejs node.js | 6.0.0 ≤ v < 6.8.1, 6.9.0 ≤ v < 6.14.4, 8.0.0 ≤ v < 8.8.1, 8.9.0 ≤ v < 8.11.4, 10.0.0 ≤ v < 10.9.0 | 6.8.1, 6.14.4, 8.8.1, 8.11.4, 10.9.0 |
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