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Bug 53521 - libgcrypt20: Multiple issues (4.4)
libgcrypt20: Multiple issues (4.4)
Status: CLOSED FIXED
Product: UCS
Classification: Unclassified
Component: Security updates
UCS 4.4
All Linux
: P3 normal (vote)
: UCS 4.4-8-errata
Assigned To: Quality Assurance
Erik Damrose
:
Depends on:
Blocks:
  Show dependency tree / graph
 
Reported: 2021-06-28 10:29 CEST by Quality Assurance
Modified: 2021-06-30 18:34 CEST (History)
0 users

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What kind of report is it?: Security Issue
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Max CVSS v3 score: 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)

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Description Quality Assurance univentionstaff 2021-06-28 10:29:07 CEST 
New Debian libgcrypt20 1.7.6-2+deb9u4 fixes:
This update addresses the following issue:
* mishandles ElGamal encryption because it lacks exponent blinding to address  a side-channel attack against mpi_powm (CVE-2021-33560)
Comment 1 Quality Assurance univentionstaff 2021-06-28 20:00:23 CEST 
--- mirror/ftp/4.3/unmaintained/4.3-2/source/libgcrypt20_1.7.6-2+deb9u3.dsc
+++ apt/ucs_4.4-0-errata4.4-8/source/libgcrypt20_1.7.6-2+deb9u4.dsc
@@ -1,3 +1,11 @@
+1.7.6-2+deb9u4 [Tue, 22 Jun 2021 20:03:02 +0200] Thorsten Alteholz <debian@alteholz.de>:
+
+  * Non-maintainer upload by the LTS Team.
+  * CVE-2021-33560
+    34_cipher-Fix-ElGamal-encryption-for-other-implementati.patch from
+    upstream LIBGCRYPT-1.8-BRANCH: Fix weak ElGamal encryption with keys *not*
+    generated by GnuPG/libgcrypt.
+
 1.7.6-2+deb9u3 [Fri, 15 Jun 2018 11:58:05 +0200] Salvatore Bonaccorso <carnil@debian.org>:
 
   * Non-maintainer upload by the Security Team.

<http://piuparts.knut.univention.de/4.4-8/#2129768904779616803>
Comment 2 Erik Damrose univentionstaff 2021-06-30 09:35:03 CEST 
OK: yaml
OK: announce_errata
OK: patch
OK: piuparts

[4.4-8] ecb5db15c2 Bug #53521: libgcrypt20 1.7.6-2+deb9u4
 doc/errata/staging/libgcrypt20.yaml | 13 +++++++++++++
 1 file changed, 13 insertions(+)
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