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ALSA-2021:4409 — Moderate: libgcrypt security and bug fix update

Affected: AlmaLinux:8: libgcrypt, AlmaLinux:8: libgcrypt-devel

The libgcrypt library provides general-purpose implementations of various cryptographic algorithms.

Security Fix(es):

* libgcrypt: mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm (CVE-2021-33560)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

bdu:2022-03136

Withdrawn: BELL-CVE-2021-33560 — CVE-2021-33560 does not affect BellSoft software

Withdrawn by the publisher.

certfr-2022-avi-386 — De multiples vulnérabilités ont été découvertes dans IBM QRadar SIEM. Certaines d'entre elles permettent à un attaquant…

certfr-2022-avi-386

EUVD-2026-262390

fkie_cve-2021-33560

GHSA-g9p5-p7h5-p2wg

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. (There is also an interoperability problem because the selection of the k integer value does not properly consider the differences between basic ElGamal encryption and generalized ElGamal encryption.) This, for example, affects use of ElGamal in OpenPGP.

gsd-2021-33560

ICSA-23-348-10 — Siemens SIMATIC S7-1500

expat 2.1.0 and earlier does not properly handle entities expansion unless an application developer uses the XML_SetEntityDeclHandler function, which allows remote attackers to cause a denial of service (resource consumption), send HTTP requests to intranet servers, or read arbitrary files via a crafted XML document, aka an XML External Entity (XXE) issue. NOTE: it could be argued that because expat already provides the ability to disable external entity expansion, the responsibility for resolving this issue lies with application developers; according to this argument, this entry should be REJECTed, and each affected application would need its own CVE. shadow: TOCTOU (time-of-check time-of-use) race condition when copying and removing directory trees run-mailcap in the Debian mime-support package before 3.52-1+deb7u1 allows context-dependent attackers to execute arbitrary commands via shell metacharacters in a filename. In Python (aka CPython) up to 3.10.8, the mailcap module does not add escape characters into commands discovered in the system mailcap file. This may allow attackers to inject shell commands into applications that call mailcap.findmatch with untrusted input (if they lack validation of user-provided filenames or arguments). The fix is also back-ported to 3.7, 3.8, 3.9 Use-after-free vulnerability in bzip2recover in bzip2 1.0.6 allows remote attackers to cause a denial of service (crash) via a crafted bzip2 file, related to block ends set to before the start o…

msrc_CVE-2021-33560 — Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to addre…

msrc_CVE-2021-33560

OESA-2021-1243 — libgcrypt security update

Affected: openEuler:20.03-LTS-SP1: libgcrypt

Libgcrypt is a general purpose cryptographic library originally based on code from GnuPG. Security Fix(es): 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. (There is also an interoperability problem because the selection of the k integer value does not properly consider the differences between basic ElGamal encryption and generalized ElGamal encryption.) This, for example, affects use of ElGamal in OpenPGP.(CVE-2021-33560)

openSUSE-SU-2021:0919-1 — Security update for libgcrypt

Security update for libgcrypt

SUSE-SU-2021:14751-1 — Security update for libgcrypt

Security update for libgcrypt

UBUNTU-CVE-2021-33560

Affected: Ubuntu:Pro:16.04:LTS: libgcrypt20, Ubuntu:18.04:LTS: libgcrypt20, Ubuntu:Pro:FIPS-updates:18.04:LTS: libgcrypt20, Ubuntu:Pro:FIPS:18.04:LTS: libgcrypt20, Ubuntu:20.04:LTS: libgcrypt20, Ubuntu:Pro:FIPS-updates:20.04:LTS: libgcrypt20, Ubuntu:Pro:FIPS:20.04:LTS: libgcrypt20, Ubuntu:22.04:LTS: libgcrypt20