Description
cipher/elgamal.c in Libgcrypt through 1.8.2, when used to encrypt messages directly, improperly encodes plaintexts, which allows attackers to obtain sensitive information by reading ciphertext data (i.e., it does not have semantic security in face of a ciphertext-only attack). The Decisional Diffie-Hellman (DDH) assumption does not hold for Libgcrypt's ElGamal implementation.
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:HConfidentialityHigh
I:NIntegrityNone
A:NAvailabilityNone
Weaknesses
Affected Products
gnupg
oss-projectaka libgcrypt, libksba
Oracle Corp.
commercial·USaka oracle
Сообщество свободного программного обеспечения
oss-projectaka fsf
ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
and 1 more affected products View all →
Exploitability
1 exploit source identified
Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.
View exploit details Official Patch Available
Attack Graph
Products CVE Techniques Tactics
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MITRE ATT&CK
1 technique Collection
References
https://github.com/weikengchen/attack-on-libgcrypt-elgamal
github.com
https://github.com/weikengchen/attack-on-libgcrypt-elgamal/wiki
github.com
https://lists.gnupg.org/pipermail/gcrypt-devel/2018-February/004394.html
lists.gnupg.org
and 4 more references View all →
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