SUSE update for samba
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-20254 |
| CWE-ID | CWE-125 |
| Exploitation vector | Local network |
| Public exploit | N/A |
| Vulnerable software |
SUSE Linux Enterprise Server Operating systems & Components / Operating system SUSE Linux Enterprise Point of Sale Operating systems & Components / Operating system SUSE Linux Enterprise Debuginfo Operating systems & Components / Operating system samba-debuginfo-32bit Operating systems & Components / Operating system package or component samba-debugsource Operating systems & Components / Operating system package or component samba-debuginfo Operating systems & Components / Operating system package or component samba-doc Operating systems & Components / Operating system package or component samba-winbind-32bit Operating systems & Components / Operating system package or component samba-client-32bit Operating systems & Components / Operating system package or component samba-32bit Operating systems & Components / Operating system package or component libwbclient0-32bit Operating systems & Components / Operating system package or component libtevent0-32bit Operating systems & Components / Operating system package or component libtdb1-32bit Operating systems & Components / Operating system package or component libtalloc2-32bit Operating systems & Components / Operating system package or component libsmbclient0-32bit Operating systems & Components / Operating system package or component samba-winbind Operating systems & Components / Operating system package or component samba-krb-printing Operating systems & Components / Operating system package or component samba-client Operating systems & Components / Operating system package or component samba Operating systems & Components / Operating system package or component libwbclient0 Operating systems & Components / Operating system package or component libtevent0 Operating systems & Components / Operating system package or component libtdb1 Operating systems & Components / Operating system package or component libtalloc2 Operating systems & Components / Operating system package or component libsmbclient0 Operating systems & Components / Operating system package or component libldb1 Operating systems & Components / Operating system package or component ldapsmb Operating systems & Components / Operating system package or component |
| Vendor | SUSE |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
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
DescriptionThe 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.
Update the affected package samba to the latest version.
Vulnerable software versionsSUSE Linux Enterprise Server: 11-SP4-LTSS-EXTREME-CORE
SUSE Linux Enterprise Point of Sale: 11-SP3
SUSE Linux Enterprise Debuginfo: 11-SP3 - 11-SP4
samba-debuginfo-32bit: before 3.6.3-94.34.1
samba-debugsource: before 3.6.3-94.34.1
samba-debuginfo: before 3.6.3-94.34.1
samba-doc: before 3.6.3-94.34.1
samba-winbind-32bit: before 3.6.3-94.34.1
samba-client-32bit: before 3.6.3-94.34.1
samba-32bit: before 3.6.3-94.34.1
libwbclient0-32bit: before 3.6.3-94.34.1
libtevent0-32bit: before 3.6.3-94.34.1
libtdb1-32bit: before 3.6.3-94.34.1
libtalloc2-32bit: before 3.6.3-94.34.1
libsmbclient0-32bit: before 3.6.3-94.34.1
samba-winbind: before 3.6.3-94.34.1
samba-krb-printing: before 3.6.3-94.34.1
samba-client: before 3.6.3-94.34.1
samba: before 3.6.3-94.34.1
libwbclient0: before 3.6.3-94.34.1
libtevent0: before 3.6.3-94.34.1
libtdb1: before 3.6.3-94.34.1
libtalloc2: before 3.6.3-94.34.1
libsmbclient0: before 3.6.3-94.34.1
libldb1: before 3.6.3-94.34.1
ldapsmb: before 1.34b-94.34.1
CPE2.3- cpe:2.3:o:suse:suse_linux_enterprise_server:11-SP4-LTSS-EXTREME-CORE:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_linux_enterprise_point_of_sale:11-SP3:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_linux_enterprise_debuginfo:11-SP3:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_linux_enterprise_debuginfo:11-SP4:*:*:*:*:*:*:*
- cpe:2.3:a:suse:samba-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:samba-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:samba-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:samba-doc:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:samba-winbind-32bit:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:samba-client-32bit:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:samba-32bit:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:libwbclient0-32bit:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:libtevent0-32bit:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:libtdb1-32bit:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:libtalloc2-32bit:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:libsmbclient0-32bit:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:samba-winbind:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:samba-krb-printing:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:samba-client:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:samba:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:libwbclient0:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:libtevent0:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:libtdb1:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:libtalloc2:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:libsmbclient0:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:libldb1:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:ldapsmb:*:*:*:*:*:suse_linux:*:*
https://www.suse.com/support/update/announcement/2021/suse-su-202114709-1/
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.
