Oval Definition:oval:org.opensuse.security:def:2111
Revision Date:2021-09-21Version:1
Title:davfs2-1.5.4-1.4 on GA media (Moderate)
Description:

These are all security issues fixed in the davfs2-1.5.4-1.4 package on the GA media of SUSE Linux Enterprise Module for Server Applications 15 SP1.
Family:unixClass:patch
Status:Reference(s):1040109
1040113
1040115
1046305
1046306
1050252
1050549
1051510
1054610
1055121
1056658
1056662
1056787
1060463
1063638
1065600
1070995
1071995
1078355
1082943
1083548
1083647
1084216
1086095
1086282
1086301
1086313
1086314
1086323
1087082
1087092
1088133
1094555
1098382
1098425
1098995
1100097
1103429
1104353
1106105
1106434
1106811
1107078
1107665
1108101
1108870
1108889
1109465
1109695
1110096
1110705
1111666
1113042
1113712
1113722
1113939
1114279
1114585
1117108
1117155
1117473
1117645
1118338
1118597
1119019
1119086
1119766
1119843
1120008
1120318
1120601
1120758
1120854
1120902
1120909
1120955
1121317
1121726
1121789
1121805
1122019
1122192
1122324
1122554
1122662
1122764
1122779
1122822
1122885
1122927
1122944
1122971
1122982
1123060
1123061
1123161
1123317
1123348
1123357
1123456
1123482
1123538
1123697
1123882
1123933
1124055
1124204
1124235
1124525
1124579
1124589
1124728
1124732
1124735
1124799
1124800
1124802
1124803
1124805
1124806
1124824
1124825
1124826
1124827
1124969
1124974
1124975
1124976
1124978
1124979
1124980
1124981
1124982
1124984
1124985
1125099
1125109
1125125
1125252
1125315
1125614
1125728
1125780
1125797
1125799
1125800
1125907
1125947
1126131
1126209
1126389
1126393
1126476
1126480
1126481
1126488
1126495
1126555
1126579
1126789
1126790
1126802
1126803
1126804
1126805
1126806
1126807
1127042
1127062
1127082
1127154
1127285
1127286
1127307
1127363
1127493
1127494
1127495
1127496
1127497
1127498
1127534
1127561
1127567
1127595
1127603
1127682
1127731
1127750
1127836
1127961
1128094
1128166
1128351
1128451
1128895
1129046
1129080
1129163
1129179
1129181
1129182
1129183
1129184
1129205
1129281
1129284
1129285
1129291
1129292
1129293
1129294
1129295
1129296
1129326
1129327
1129330
1129363
1129366
1129497
1129519
1129543
1129547
1129551
1129581
1129625
1129662
1129664
1129739
1129923
1130246
1133810
1136021
1138425
1138464
1138688
1140868
1141322
1145665
1146065
1146068
1146211
1146212
1146213
1148931
1149292
1149293
1149294
1149295
1149296
1149297
1149298
1149299
1149302
1149303
1149304
1149323
1151781
1151782
1151783
1151784
1151785
1151786
1154401
1156188
1161167
824948
CVE-2014-4362
CVE-2017-9111
CVE-2017-9113
CVE-2017-9115
CVE-2018-12910
CVE-2018-19870
CVE-2018-19872
CVE-2018-20669
CVE-2019-11597
CVE-2019-11710
CVE-2019-11714
CVE-2019-11716
CVE-2019-11718
CVE-2019-11720
CVE-2019-11721
CVE-2019-11723
CVE-2019-11724
CVE-2019-11725
CVE-2019-11727
CVE-2019-11728
CVE-2019-11733
CVE-2019-11735
CVE-2019-11736
CVE-2019-11738
CVE-2019-11740
CVE-2019-11742
CVE-2019-11743
CVE-2019-11744
CVE-2019-11746
CVE-2019-11747
CVE-2019-11748
CVE-2019-11749
CVE-2019-11750
CVE-2019-11751
CVE-2019-11752
CVE-2019-11753
CVE-2019-14980
CVE-2019-14981
CVE-2019-15139
CVE-2019-15140
CVE-2019-15141
CVE-2019-16708
CVE-2019-16709
CVE-2019-16710
CVE-2019-16711
CVE-2019-16712
CVE-2019-16713
CVE-2019-18804
CVE-2019-2024
CVE-2019-3459
CVE-2019-3460
CVE-2019-3819
CVE-2019-6974
CVE-2019-7221
CVE-2019-7222
CVE-2019-7308
CVE-2019-7572
CVE-2019-7573
CVE-2019-7574
CVE-2019-7575
CVE-2019-7576
CVE-2019-7577
CVE-2019-7578
CVE-2019-7635
CVE-2019-7636
CVE-2019-7637
CVE-2019-7638
CVE-2019-8595
CVE-2019-8607
CVE-2019-8615
CVE-2019-8644
CVE-2019-8649
CVE-2019-8658
CVE-2019-8666
CVE-2019-8669
CVE-2019-8671
CVE-2019-8672
CVE-2019-8673
CVE-2019-8676
CVE-2019-8677
CVE-2019-8678
CVE-2019-8679
CVE-2019-8680
CVE-2019-8681
CVE-2019-8683
CVE-2019-8684
CVE-2019-8686
CVE-2019-8687
CVE-2019-8688
CVE-2019-8689
CVE-2019-8690
CVE-2019-8912
CVE-2019-8980
CVE-2019-9213
CVE-2019-9811
CVE-2019-9812
CVE-2020-0569
SUSE-SU-2019:0784-1
SUSE-SU-2019:0917-1
SUSE-SU-2019:0927-1
SUSE-SU-2019:1607-1
SUSE-SU-2019:1773-1
SUSE-SU-2019:1963-1
SUSE-SU-2019:2428-1
SUSE-SU-2019:2545-1
SUSE-SU-2019:2896-1
SUSE-SU-2019:3033-1
SUSE-SU-2020:0349-1
Platform(s):SUSE Cloud Compute Node for SUSE Linux Enterprise 12 5
SUSE Linux Enterprise Desktop 11 SP2
SUSE Linux Enterprise Desktop 11 SP3
SUSE Linux Enterprise Desktop 11 SP4
SUSE Linux Enterprise Desktop 12
SUSE Linux Enterprise Desktop 12 SP1
SUSE Linux Enterprise Desktop 12 SP2
SUSE Linux Enterprise Desktop 12 SP3
SUSE Linux Enterprise Desktop 12 SP4
SUSE Linux Enterprise for SAP 11 SP3
SUSE Linux Enterprise for SAP 11 SP4
SUSE Linux Enterprise High Availability 15
SUSE Linux Enterprise High Availability 15 SP1
SUSE Linux Enterprise High Performance Computing 15 SP1
SUSE Linux Enterprise Module for additional PackageHub packages 15
SUSE Linux Enterprise Module for Basesystem 15
SUSE Linux Enterprise Module for Desktop Applications 15
SUSE Linux Enterprise Module for Desktop Applications 15 SP1
SUSE Linux Enterprise Module for Desktop Applications 15 SP2
SUSE Linux Enterprise Module for Development Tools 15
SUSE Linux Enterprise Module for Development Tools 15 SP1
SUSE Linux Enterprise Module for Development Tools 15 SP2
SUSE Linux Enterprise Module for High Performance Computing 15
SUSE Linux Enterprise Module for Legacy Software 15
SUSE Linux Enterprise Module for Live Patching 15
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP1
SUSE Linux Enterprise Module for Public Cloud 15
SUSE Linux Enterprise Module for Server Applications 15
SUSE Linux Enterprise Module for Server Applications 15 SP1
SUSE Linux Enterprise Module for Web Scripting 15
SUSE Linux Enterprise Module for Web Scripting 15 SP1
SUSE Linux Enterprise Real Time Extension 11 SP1
SUSE Linux Enterprise Server 11
SUSE Linux Enterprise Server 11 SP1-CLIENT-TOOLS
SUSE Linux Enterprise Server 11 SP1-LTSS
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server 12 SP1
SUSE Linux Enterprise Server 12 SP3
SUSE Linux Enterprise Server 15 SP1
SUSE Linux Enterprise Server for Raspberry Pi 12 SP2
SUSE Linux Enterprise Server for SAP Applications 15 SP1
SUSE Linux Enterprise Software Development Kit 11 SP2
SUSE Linux Enterprise Software Development Kit 11 SP3
SUSE Linux Enterprise Software Development Kit 12
SUSE Linux Enterprise Software Development Kit 12 SP1
SUSE Linux Enterprise Software Development Kit 12 SP2
SUSE Linux Enterprise Storage 6
SUSE Linux Enterprise Workstation Extension 15
SUSE Manager Proxy 4.0
SUSE Manager Server 4.0
SUSE Package Hub for SUSE Linux Enterprise 12
Product(s):
Definition Synopsis
  • SUSE Cloud Compute Node for SUSE Linux Enterprise 12 5 is installed
  • AND haproxy-1.5.4-1 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Desktop 12 is installed
  • AND perl-YAML-LibYAML-0.38-10 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Desktop 12 SP1 is installed
  • AND Package Information
  • libarchive-3.1.2-25.1 is installed
  • OR libarchive13-3.1.2-25.1 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Desktop 12 SP2 is installed
  • AND yast2-users-3.1.57-16 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Desktop 12 SP3 is installed
  • AND Package Information
  • ImageMagick-6.8.8.1-70 is installed
  • OR libMagick++-6_Q16-3-6.8.8.1-70 is installed
  • OR libMagickCore-6_Q16-1-6.8.8.1-70 is installed
  • OR libMagickCore-6_Q16-1-32bit-6.8.8.1-70 is installed
  • OR libMagickWand-6_Q16-1-6.8.8.1-70 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Desktop 12 SP4 is installed
  • AND Package Information
  • DirectFB-1.7.1-6 is installed
  • OR lib++dfb-1_7-1-1.7.1-6 is installed
  • OR libdirectfb-1_7-1-1.7.1-6 is installed
  • OR libdirectfb-1_7-1-32bit-1.7.1-6 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise High Availability 15 is installed
  • AND Package Information
  • drbd-9.0.13+git.b83ade31-3.2 is installed
  • OR drbd-kmp-default-9.0.13+git.b83ade31_k4.12.14_23-3.2 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise High Availability 15 SP1 is installed
  • AND Package Information
  • cluster-md-kmp-default-4.12.14-197.10 is installed
  • OR dlm-kmp-default-4.12.14-197.10 is installed
  • OR gfs2-kmp-default-4.12.14-197.10 is installed
  • OR kernel-default-4.12.14-197.10 is installed
  • OR ocfs2-kmp-default-4.12.14-197.10 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Module for Server Applications 15 SP1 is installed
  • AND davfs2-1.5.4-1.4 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Module for additional PackageHub packages 15 is installed
  • AND Package Information
  • libxmlsec1-gcrypt1-1.2.26-3.3 is installed
  • OR libxmlsec1-gnutls1-1.2.26-3.3 is installed
  • OR libxmlsec1-openssl1-1.2.26-3.3 is installed
  • OR xmlsec1-1.2.26-3.3 is installed
  • OR xmlsec1-gnutls-devel-1.2.26-3.3 is installed
  • OR xmlsec1-openssl-devel-1.2.26-3.3 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Module for Basesystem 15 is installed
  • AND Package Information
  • kernel-default-4.12.14-150.14 is installed
  • OR kernel-default-base-4.12.14-150.14 is installed
  • OR kernel-default-devel-4.12.14-150.14 is installed
  • OR kernel-default-man-4.12.14-150.14 is installed
  • OR kernel-devel-4.12.14-150.14 is installed
  • OR kernel-macros-4.12.14-150.14 is installed
  • OR kernel-source-4.12.14-150.14 is installed
  • OR kernel-zfcpdump-4.12.14-150.14 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Module for Desktop Applications 15 is installed
  • AND Package Information
  • SDL-1.2.15-3.9 is installed
  • OR libSDL-1_2-0-1.2.15-3.9 is installed
  • OR libSDL-devel-1.2.15-3.9 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Module for Desktop Applications 15 SP1 is installed
  • AND Package Information
  • wireshark-2.4.15-3.28 is installed
  • OR wireshark-devel-2.4.15-3.28 is installed
  • OR wireshark-ui-qt-2.4.15-3.28 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Module for Desktop Applications 15 SP2 is installed
  • AND Package Information
  • jasper-2.0.14-3.11 is installed
  • OR libjasper-devel-2.0.14-3.11 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Module for Development Tools 15 is installed
  • AND Package Information
  • git-2.16.4-3.3 is installed
  • OR git-arch-2.16.4-3.3 is installed
  • OR git-cvs-2.16.4-3.3 is installed
  • OR git-daemon-2.16.4-3.3 is installed
  • OR git-doc-2.16.4-3.3 is installed
  • OR git-email-2.16.4-3.3 is installed
  • OR git-gui-2.16.4-3.3 is installed
  • OR git-svn-2.16.4-3.3 is installed
  • OR git-web-2.16.4-3.3 is installed
  • OR gitk-2.16.4-3.3 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Module for Development Tools 15 SP1 is installed
  • AND Package Information
  • subversion-1.10.6-3.6 is installed
  • OR subversion-bash-completion-1.10.6-3.6 is installed
  • OR subversion-perl-1.10.6-3.6 is installed
  • OR subversion-python-1.10.6-3.6 is installed
  • OR subversion-tools-1.10.6-3.6 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Module for Development Tools 15 SP2 is installed
  • AND rpmlint-1.10-7.12 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Module for High Performance Computing 15 is installed
  • AND Package Information
  • libpmi0-17.11.13-6.15 is installed
  • OR libslurm32-17.11.13-6.15 is installed
  • OR perl-slurm-17.11.13-6.15 is installed
  • OR slurm-17.11.13-6.15 is installed
  • OR slurm-auth-none-17.11.13-6.15 is installed
  • OR slurm-config-17.11.13-6.15 is installed
  • OR slurm-devel-17.11.13-6.15 is installed
  • OR slurm-doc-17.11.13-6.15 is installed
  • OR slurm-lua-17.11.13-6.15 is installed
  • OR slurm-munge-17.11.13-6.15 is installed
  • OR slurm-node-17.11.13-6.15 is installed
  • OR slurm-pam_slurm-17.11.13-6.15 is installed
  • OR slurm-plugins-17.11.13-6.15 is installed
  • OR slurm-slurmdbd-17.11.13-6.15 is installed
  • OR slurm-sql-17.11.13-6.15 is installed
  • OR slurm-torque-17.11.13-6.15 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Module for Legacy Software 15 is installed
  • AND Package Information
  • kernel-default-4.12.14-25.16 is installed
  • OR reiserfs-kmp-default-4.12.14-25.16 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Module for Live Patching 15 is installed
  • AND Package Information
  • kernel-livepatch-4_12_14-23-default-3-7 is installed
  • OR kernel-livepatch-SLE15_Update_0-3-7 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 is installed
  • AND Package Information
  • tomcat-9.0.10-3.7 is installed
  • OR tomcat-docs-webapp-9.0.10-3.7 is installed
  • OR tomcat-embed-9.0.10-3.7 is installed
  • OR tomcat-javadoc-9.0.10-3.7 is installed
  • OR tomcat-jsvc-9.0.10-3.7 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP1 is installed
  • AND Package Information
  • 389-ds-1.4.0.3-4.7 is installed
  • OR 389-ds-snmp-1.4.0.3-4.7 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Module for Public Cloud 15 is installed
  • AND Package Information
  • kernel-azure-4.12.14-5.16 is installed
  • OR kernel-azure-base-4.12.14-5.16 is installed
  • OR kernel-azure-devel-4.12.14-5.16 is installed
  • OR kernel-devel-azure-4.12.14-5.16 is installed
  • OR kernel-source-azure-4.12.14-5.16 is installed
  • OR kernel-syms-azure-4.12.14-5.16 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Module for Server Applications 15 is installed
  • AND Package Information
  • ovmf-2017+git1510945757.b2662641d5-5.14 is installed
  • OR ovmf-tools-2017+git1510945757.b2662641d5-5.14 is installed
  • OR qemu-ovmf-x86_64-2017+git1510945757.b2662641d5-5.14 is installed
  • OR qemu-uefi-aarch64-2017+git1510945757.b2662641d5-5.14 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Module for Server Applications 15 SP1 is installed
  • AND Package Information
  • 389-ds-1.4.0.3-4.7 is installed
  • OR 389-ds-devel-1.4.0.3-4.7 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Module for Web Scripting 15 is installed
  • AND Package Information
  • nodejs8-8.15.0-3.11 is installed
  • OR nodejs8-devel-8.15.0-3.11 is installed
  • OR nodejs8-docs-8.15.0-3.11 is installed
  • OR npm8-8.15.0-3.11 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Module for Web Scripting 15 SP1 is installed
  • AND Package Information
  • apache2-mod_php7-7.2.5-4.35 is installed
  • OR php7-7.2.5-4.35 is installed
  • OR php7-bcmath-7.2.5-4.35 is installed
  • OR php7-bz2-7.2.5-4.35 is installed
  • OR php7-calendar-7.2.5-4.35 is installed
  • OR php7-ctype-7.2.5-4.35 is installed
  • OR php7-curl-7.2.5-4.35 is installed
  • OR php7-dba-7.2.5-4.35 is installed
  • OR php7-devel-7.2.5-4.35 is installed
  • OR php7-dom-7.2.5-4.35 is installed
  • OR php7-enchant-7.2.5-4.35 is installed
  • OR php7-exif-7.2.5-4.35 is installed
  • OR php7-fastcgi-7.2.5-4.35 is installed
  • OR php7-fileinfo-7.2.5-4.35 is installed
  • OR php7-fpm-7.2.5-4.35 is installed
  • OR php7-ftp-7.2.5-4.35 is installed
  • OR php7-gd-7.2.5-4.35 is installed
  • OR php7-gettext-7.2.5-4.35 is installed
  • OR php7-gmp-7.2.5-4.35 is installed
  • OR php7-iconv-7.2.5-4.35 is installed
  • OR php7-intl-7.2.5-4.35 is installed
  • OR php7-json-7.2.5-4.35 is installed
  • OR php7-ldap-7.2.5-4.35 is installed
  • OR php7-mbstring-7.2.5-4.35 is installed
  • OR php7-mysql-7.2.5-4.35 is installed
  • OR php7-odbc-7.2.5-4.35 is installed
  • OR php7-opcache-7.2.5-4.35 is installed
  • OR php7-openssl-7.2.5-4.35 is installed
  • OR php7-pcntl-7.2.5-4.35 is installed
  • OR php7-pdo-7.2.5-4.35 is installed
  • OR php7-pear-7.2.5-4.35 is installed
  • OR php7-pear-Archive_Tar-7.2.5-4.35 is installed
  • OR php7-pgsql-7.2.5-4.35 is installed
  • OR php7-phar-7.2.5-4.35 is installed
  • OR php7-posix-7.2.5-4.35 is installed
  • OR php7-shmop-7.2.5-4.35 is installed
  • OR php7-snmp-7.2.5-4.35 is installed
  • OR php7-soap-7.2.5-4.35 is installed
  • OR php7-sockets-7.2.5-4.35 is installed
  • OR php7-sqlite-7.2.5-4.35 is installed
  • OR php7-sysvmsg-7.2.5-4.35 is installed
  • OR php7-sysvsem-7.2.5-4.35 is installed
  • OR php7-sysvshm-7.2.5-4.35 is installed
  • OR php7-tokenizer-7.2.5-4.35 is installed
  • OR php7-wddx-7.2.5-4.35 is installed
  • OR php7-xmlreader-7.2.5-4.35 is installed
  • OR php7-xmlrpc-7.2.5-4.35 is installed
  • OR php7-xmlwriter-7.2.5-4.35 is installed
  • OR php7-xsl-7.2.5-4.35 is installed
  • OR php7-zip-7.2.5-4.35 is installed
  • OR php7-zlib-7.2.5-4.35 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Server 12 is installed
  • AND Package Information
  • libfreebl3-3.16.4-5 is installed
  • OR libfreebl3-32bit-3.16.4-5 is installed
  • OR libfreebl3-hmac-3.16.4-5 is installed
  • OR libfreebl3-hmac-32bit-3.16.4-5 is installed
  • OR libsoftokn3-3.16.4-5 is installed
  • OR libsoftokn3-32bit-3.16.4-5 is installed
  • OR libsoftokn3-hmac-3.16.4-5 is installed
  • OR libsoftokn3-hmac-32bit-3.16.4-5 is installed
  • OR mozilla-nss-3.16.4-5 is installed
  • OR mozilla-nss-32bit-3.16.4-5 is installed
  • OR mozilla-nss-certs-3.16.4-5 is installed
  • OR mozilla-nss-certs-32bit-3.16.4-5 is installed
  • OR mozilla-nss-tools-3.16.4-5 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Server 12 SP1 is installed
  • AND Package Information
  • aaa_base-13.2+git20140911.61c1681-9 is installed
  • OR aaa_base-extras-13.2+git20140911.61c1681-9 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Server 12 SP3 is installed
  • AND Package Information
  • libFLAC++6-1.3.0-11 is installed
  • OR libFLAC8-1.3.0-11 is installed
  • OR libFLAC8-32bit-1.3.0-11 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Server for Raspberry Pi 12 SP2 is installed
  • AND libdcerpc-atsvc0-4.2.4-26.2 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Software Development Kit 12 is installed
  • AND Package Information
  • bind-9.9.6P1-23.1 is installed
  • OR bind-devel-9.9.6P1-23.1 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Software Development Kit 12 SP1 is installed
  • AND aaa_base-malloccheck-13.2+git20140911.61c1681-9.1 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Software Development Kit 12 SP2 is installed
  • AND Package Information
  • libid3tag-devel-0.15.1b-182.58 is installed
  • OR libid3tag0-0.15.1b-182.58 is installed
  • Definition Synopsis
  • SUSE Linux Enterprise Workstation Extension 15 is installed
  • AND enigmail-2.0.9-3.13 is installed
  • Definition Synopsis
  • SUSE Package Hub for SUSE Linux Enterprise 12 is installed
  • AND Package Information
  • chromedriver-53.0.2785.89-96 is installed
  • OR chromium-53.0.2785.89-96 is installed
  • OR chromium-desktop-gnome-53.0.2785.89-96 is installed
  • OR chromium-desktop-kde-53.0.2785.89-96 is installed
  • OR chromium-ffmpegsumo-53.0.2785.89-96 is installed
  • BACK