Vulnerability · Published Feb 21, 2022 · Assigned by redhat
CVE-2021-44141
Medium 4.3
In plain English
A medium-severity information exposure in Samba. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 65% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)4.3Medium
Exploit odds (30 days)1.1%top 34.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
All versions of Samba prior to 4.15.5 are vulnerable to a malicious client using a server symlink to determine if a file or directory exists in an area of the server file system not exported under the share definition. SMB1 with unix extensions has to be enabled in order for this attack to succeed.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | ctdb | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | libsmbclient | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | libsmbclient-devel | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | libwbclient | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | libwbclient-devel | 4.15.5-8.el8_6 | ALSA-2022:2074 |
| AlmaLinux:8 | libwbclient-devel | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | python3-samba | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | python3-samba-test | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | samba | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | samba-client | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | samba-client-libs | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | samba-common | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | samba-common-libs | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | samba-common-tools | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | samba-devel | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | samba-krb5-printing | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | samba-libs | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | samba-pidl | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | samba-test | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | samba-test-libs | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | samba-vfs-iouring | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | samba-winbind | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | samba-winbind-clients | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | samba-winbind-krb5-locator | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | samba-winbind-modules | 4.15.5-5.el8 | ALSA-2022:2074 |
| AlmaLinux:8 | samba-winexe | 4.15.5-5.el8 | ALSA-2022:2074 |
| Debian:12 | samba | 2:4.16.0+dfsg-2 | DEBIAN-CVE-2021-44141 |
| Debian:13 | samba | 2:4.16.0+dfsg-2 | DEBIAN-CVE-2021-44141 |
| Debian:14 | samba | 2:4.16.0+dfsg-2 | DEBIAN-CVE-2021-44141 |
| Rocky Linux:8 | samba | 0:4.15.5-5.el8 | RLSA-2022:2074 |
| Ubuntu:22.04:LTS | samba | no fix listed | UBUNTU-CVE-2021-44141 |
Affected products (as reported)
Weakness: CWE-200