Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnupg | Libgcrypt | <= 1.8.2 |
Related Weaknesses (CWE)
References
- https://github.com/weikengchen/attack-on-libgcrypt-elgamalThird Party Advisory
- https://github.com/weikengchen/attack-on-libgcrypt-elgamal/wikiExploitThird Party Advisory
- https://lists.gnupg.org/pipermail/gcrypt-devel/2018-February/004394.htmlIssue TrackingThird Party Advisory
- https://www.oracle.com/security-alerts/cpujan2020.html
- https://github.com/weikengchen/attack-on-libgcrypt-elgamalThird Party Advisory
- https://github.com/weikengchen/attack-on-libgcrypt-elgamal/wikiExploitThird Party Advisory
- https://lists.gnupg.org/pipermail/gcrypt-devel/2018-February/004394.htmlIssue TrackingThird Party Advisory
- https://www.oracle.com/security-alerts/cpujan2020.html
FAQ
What is CVE-2018-6829?
CVE-2018-6829 is a vulnerability with a CVSS score of 7.5 (HIGH). 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...
How severe is CVE-2018-6829?
CVE-2018-6829 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-6829?
Check the references section above for vendor advisories and patch information. Affected products include: Gnupg Libgcrypt.