Ubuntu.comUB:CVE-2018-6829CVE-2018-6829
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
0.002 Low
EPSS
Percentile
56.5%
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.
Notes
| Author | Note |
|---|---|
| mdeslaur | this is a flaw in applications that misuse libgcrypt as of 2018-05-31, no actionable action in libgcrypt, marking as not-affected |
References
github.com/weikengchen/attack-on-libgcrypt-elgamal
github.com/weikengchen/attack-on-libgcrypt-elgamal/wiki
launchpad.net/bugs/cve/CVE-2018-6829
lists.gnupg.org/pipermail/gcrypt-devel/2018-February/004394.html
lists.gnupg.org/pipermail/gcrypt-devel/2018-February/004401.html
nvd.nist.gov/vuln/detail/CVE-2018-6829
security-tracker.debian.org/tracker/CVE-2018-6829
www.cve.org/CVERecord?id=CVE-2018-6829
Related
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
0.002 Low
EPSS
Percentile
56.5%