Vulnerability Description
Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm, and the window size is not chosen appropriately. This, for example, affects use of ElGamal in OpenPGP.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnupg | Libgcrypt | < 1.8.8 |
| Debian | Debian Linux | 9.0 |
| Fedoraproject | Fedora | 33 |
| Oracle | Communications Cloud Native Core Binding Support Function | 1.11.0 |
| Oracle | Communications Cloud Native Core Network Function Cloud Native Environment | 1.9.0 |
| Oracle | Communications Cloud Native Core Network Repository Function | 1.14.0 |
| Oracle | Communications Cloud Native Core Network Slice Selection Function | 1.8.0 |
| Oracle | Communications Cloud Native Core Service Communication Proxy | 1.15.0 |
Related Weaknesses (CWE)
References
- https://dev.gnupg.org/T5305Release NotesVendor Advisory
- https://dev.gnupg.org/T5328Vendor Advisory
- https://dev.gnupg.org/T5466Release NotesVendor Advisory
- https://dev.gnupg.org/rCe8b7f10be275bcedb5fc05ed4837a89bfd605c61PatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00021.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202210-13Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatchThird Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.htmlPatchThird Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.htmlPatchThird Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlThird Party Advisory
- https://dev.gnupg.org/T5305Release NotesVendor Advisory
- https://dev.gnupg.org/T5328Vendor Advisory
- https://dev.gnupg.org/T5466Release NotesVendor Advisory
FAQ
What is CVE-2021-33560?
CVE-2021-33560 is a vulnerability with a CVSS score of 7.5 (HIGH). Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm, and the window size is not chosen appr...
How severe is CVE-2021-33560?
CVE-2021-33560 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-2021-33560?
Check the references section above for vendor advisories and patch information. Affected products include: Gnupg Libgcrypt, Debian Debian Linux, Fedoraproject Fedora, Oracle Communications Cloud Native Core Binding Support Function, Oracle Communications Cloud Native Core Network Function Cloud Native Environment.