CVE-2018-0732
Client DoS due to large DH parameter
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).
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:NConfidentialityNone
I:NIntegrityNone
A:HAvailabilityHigh
Weaknesses
Affected Products
Oracle Corp.
commercial·USaka oracle
Novell Inc.
commercial·US
ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
Red Hat Inc.
commercial·USaka red hat
OpenSSL
oss-project·USaka open ssl
Canonical Ltd.
commercial·GBaka canonical
and 37 more affected products View all →
Exploitability
Official Patch Available
References
https://lists.debian.org/debian-lts-announce/2018/07/msg00043.html
lists.debian.org
http://www.securityfocus.com/bid/104442
securityfocus.com
https://www.debian.org/security/2018/dsa-4355
debian.org
and 61 more references View all →
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