CVE-2021-33560: libgcrypt before 1.8.8 (exclusive), from 1.9.0 (inclusive), before 1.9.3 (exclusive); +11 more affected products

Affected technology

libgcrypt · before 1.8.8 (exclusive)
gnupg

libgcrypt · from 1.9.0 (inclusive), before 1.9.3 (exclusive)
gnupg

debian linux · 9.0
debian

fedora · 33
fedoraproject

fedora · 34
fedoraproject

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 function cloud native environment · 1.10.0
oracle

communications cloud native core network repository function · 1.14.0
oracle

communications cloud native core network repository function · 1.15.0
oracle

communications cloud native core network repository function · 1.15.1
oracle

communications cloud native core network slice selection function · 1.8.0
oracle

communications cloud native core service communication proxy · 1.15.0
oracle

n/a · n/a
Vendor not specified by the source

SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · V3.1.0 to before V3.1.5
Siemens

SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · V3.1.0 to before V3.1.5
Siemens

SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · V3.1.0 to before V3.1.5
Siemens

Description’s affected range: 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

Component: Not specified by the source

Attack conditions (NVD, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

Attack conditions (Source advisory, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

NVD’s CVSS 3.1 assessment (base score 7.5/10) rates confidentiality impact as high; integrity and availability impact as none. Source advisory’s CVSS 3.1 assessment (base score 7.5/10) rates confidentiality impact as high; integrity and availability impact as none. The description does not specify what an attacker can achieve beyond these rated impacts.