SUSE update for samba

1) Out-of-bounds read

EUVDB-ID: #VU52748

Risk: Medium

CVSSv4.0: 0.5 [CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-20254

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote user to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when mapping Windows group identities (SIDs) into unix group identities (gids), which resulted into negative idmap cache entries created in the Samba server process token. An attacker who can manage to trigger the vulnerability can crash the Samba server or potentially perform unauthorized actions on the system.

Mitigation

Update the affected package samba to the latest version.

Vulnerable software versions

SUSE Linux Enterprise High Availability: 12-SP5

SUSE Linux Enterprise Software Development Kit: 12-SP5

SUSE Linux Enterprise Server: 12-SP5

ctdb-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

ctdb: before 4.10.18+git.269.dd608524c88-3.27.1

samba-doc: before 4.10.18+git.269.dd608524c88-3.27.1

samba-winbind-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

samba-winbind-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

samba-libs-python3-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

samba-libs-python3-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

samba-libs-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

samba-libs-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

samba-client-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

samba-client-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libwbclient0-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libwbclient0-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libtevent-util0-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libtevent-util0-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libsmbldap2-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libsmbldap2-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libsmbconf0-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libsmbconf0-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libsmbclient0-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libsmbclient0-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libsamdb0-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libsamdb0-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-util0-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-util0-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-passdb0-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-passdb0-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-hostconfig0-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-hostconfig0-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-errors0-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-errors0-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-credentials0-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-credentials0-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libnetapi0-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libnetapi0-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libndr0-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libndr0-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libndr-standard0-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libndr-standard0-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libndr-nbt0-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libndr-nbt0-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libndr-krb5pac0-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libndr-krb5pac0-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libdcerpc0-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libdcerpc0-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libdcerpc-binding0-debuginfo-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

libdcerpc-binding0-32bit: before 4.10.18+git.269.dd608524c88-3.27.1

samba-winbind-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

samba-winbind: before 4.10.18+git.269.dd608524c88-3.27.1

samba-libs-python3-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

samba-libs-python3: before 4.10.18+git.269.dd608524c88-3.27.1

samba-libs-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

samba-libs: before 4.10.18+git.269.dd608524c88-3.27.1

samba-client-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

samba-client: before 4.10.18+git.269.dd608524c88-3.27.1

samba: before 4.10.18+git.269.dd608524c88-3.27.1

libwbclient0-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

libwbclient0: before 4.10.18+git.269.dd608524c88-3.27.1

libtevent-util0-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

libtevent-util0: before 4.10.18+git.269.dd608524c88-3.27.1

libsmbldap2-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

libsmbldap2: before 4.10.18+git.269.dd608524c88-3.27.1

libsmbconf0-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

libsmbconf0: before 4.10.18+git.269.dd608524c88-3.27.1

libsmbclient0-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

libsmbclient0: before 4.10.18+git.269.dd608524c88-3.27.1

libsamdb0-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

libsamdb0: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-util0-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-util0: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-passdb0-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-passdb0: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-hostconfig0-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-hostconfig0: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-errors0-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-errors0: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-credentials0-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-credentials0: before 4.10.18+git.269.dd608524c88-3.27.1

libnetapi0-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

libnetapi0: before 4.10.18+git.269.dd608524c88-3.27.1

libndr0-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

libndr0: before 4.10.18+git.269.dd608524c88-3.27.1

libndr-standard0-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

libndr-standard0: before 4.10.18+git.269.dd608524c88-3.27.1

libndr-nbt0-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

libndr-nbt0: before 4.10.18+git.269.dd608524c88-3.27.1

libndr-krb5pac0-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

libndr-krb5pac0: before 4.10.18+git.269.dd608524c88-3.27.1

libdcerpc0-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

libdcerpc0: before 4.10.18+git.269.dd608524c88-3.27.1

libdcerpc-binding0-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

libdcerpc-binding0: before 4.10.18+git.269.dd608524c88-3.27.1

samba-debugsource: before 4.10.18+git.269.dd608524c88-3.27.1

samba-debuginfo: before 4.10.18+git.269.dd608524c88-3.27.1

samba-core-devel: before 4.10.18+git.269.dd608524c88-3.27.1

libwbclient-devel: before 4.10.18+git.269.dd608524c88-3.27.1

libsmbclient-devel: before 4.10.18+git.269.dd608524c88-3.27.1

libsamba-util-devel: before 4.10.18+git.269.dd608524c88-3.27.1

libndr-standard-devel: before 4.10.18+git.269.dd608524c88-3.27.1

libndr-nbt-devel: before 4.10.18+git.269.dd608524c88-3.27.1

libndr-krb5pac-devel: before 4.10.18+git.269.dd608524c88-3.27.1

libndr-devel: before 4.10.18+git.269.dd608524c88-3.27.1

CPE2.3

• cpe:2.3:o:suse:suse_linux_enterprise_high_availability:12-SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_software_development_kit:12-SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server:12-SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:ctdb-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:ctdb:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-doc:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-winbind-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-winbind-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-libs-python3-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-libs-python3-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-libs-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-libs-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-client-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-client-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libwbclient0-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libwbclient0-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libtevent-util0-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libtevent-util0-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsmbldap2-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsmbldap2-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsmbconf0-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsmbconf0-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsmbclient0-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsmbclient0-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamdb0-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamdb0-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-util0-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-util0-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-passdb0-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-passdb0-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-hostconfig0-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-hostconfig0-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-errors0-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-errors0-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-credentials0-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-credentials0-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libnetapi0-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libnetapi0-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr0-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr0-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr-standard0-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr-standard0-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr-nbt0-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr-nbt0-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr-krb5pac0-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr-krb5pac0-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libdcerpc0-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libdcerpc0-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libdcerpc-binding0-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libdcerpc-binding0-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-winbind-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-winbind:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-libs-python3-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-libs-python3:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-libs-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-libs:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-client-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-client:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libwbclient0-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libwbclient0:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libtevent-util0-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libtevent-util0:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsmbldap2-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsmbldap2:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsmbconf0-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsmbconf0:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsmbclient0-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsmbclient0:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamdb0-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamdb0:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-util0-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-util0:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-passdb0-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-passdb0:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-hostconfig0-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-hostconfig0:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-errors0-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-errors0:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-credentials0-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-credentials0:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libnetapi0-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libnetapi0:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr0-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr0:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr-standard0-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr-standard0:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr-nbt0-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr-nbt0:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr-krb5pac0-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr-krb5pac0:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libdcerpc0-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libdcerpc0:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libdcerpc-binding0-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libdcerpc-binding0:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-debugsource:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:samba-core-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libwbclient-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsmbclient-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libsamba-util-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr-standard-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr-nbt-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr-krb5pac-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libndr-devel:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20211438-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.