Bug 53478 - libgcrypt20: Multiple issues (5.0)
libgcrypt20: Multiple issues (5.0)
Status: CLOSED FIXED
Product: UCS
Classification: Unclassified
Component: Security updates
UCS 5.0
All Linux
: P3 normal (vote)
: UCS 5.0-0-errata
Assigned To: Quality Assurance
Erik Damrose
:
Depends on:
Blocks:
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Reported: 2021-06-21 10:00 CEST by Quality Assurance
Modified: 2021-06-30 18:54 CEST (History)
0 users

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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 2021-06-21 10:00:09 CEST
New Debian libgcrypt20 1.8.4-5+deb10u1 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 2021-06-23 15:14:43 CEST
--- mirror/ftp/pool/main/libg/libgcrypt20/libgcrypt20_1.8.4-5.dsc
+++ apt/ucs_5.0-0-errata5.0-0/source/libgcrypt20_1.8.4-5+deb10u1.dsc
@@ -1,3 +1,9 @@
+1.8.4-5+deb10u1 [Sat, 29 May 2021 13:32:02 +0200] Andreas Metzler <ametzler@debian.org>:
+
+  * 31_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. CVE-2021-33560
+
 1.8.4-5 [Sun, 20 Jan 2019 14:47:23 +0100] Andreas Metzler <ametzler@debian.org>:
 
   * 30_doc-Fix-library-initialization-examples.patch from upstream

<http://piuparts.knut.univention.de/5.0-0/#5859685253528847669>
Comment 2 Philipp Hahn univentionstaff 2021-06-23 15:53:04 CEST
OK: yaml
OK: announce_errata
OK: patch
OK: piuparts

[5.0-0] 1ec9e9bc96 Bug #53478: libgcrypt20 1.8.4-5+deb10u1
 doc/errata/staging/libgcrypt20.yaml | 13 +++++++++++++
 1 file changed, 13 insertions(+)
Comment 3 Erik Damrose univentionstaff 2021-06-30 18:54:29 CEST
<https://errata.software-univention.de/#/?erratum=5.0x36>