CVE-2021-44142

Description

The Samba vfs_fruit module uses extended file attributes (EA, xattr) to provide "...enhanced compatibility with Apple SMB clients and interoperability with a Netatalk 3 AFP fileserver." Samba versions prior to 4.13.17, 4.14.12 and 4.15.5 with vfs_fruit configured allow out-of-bounds heap read and write via specially crafted extended file attributes. A remote attacker with write access to extended file attributes can execute arbitrary code with the privileges of smbd, typically root.

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 25.14% Top 5%
Vendor Advisory gentoo.org
Affected: Samba Samba
Published at:
Updated at:

References

Link Tags
https://www.samba.org/samba/security/CVE-2021-44142.html
https://www.zerodayinitiative.com/blog/2022/2/1/cve-2021-44142-details-on-a-samba-code-execution-bug-demonstrated-at-pwn2own-austin
https://kb.cert.org/vuls/id/119678 third party advisory
https://bugzilla.samba.org/show_bug.cgi?id=14914
https://security.gentoo.org/glsa/202309-06 vendor advisory
https://www.kb.cert.org/vuls/id/119678

Frequently Asked Questions

What is the severity of CVE-2021-44142?
CVE-2021-44142 has been scored as a high severity vulnerability.
How to fix CVE-2021-44142?
To fix CVE-2021-44142, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-44142 being actively exploited in the wild?
It is possible that CVE-2021-44142 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~25% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-44142?
CVE-2021-44142 affects Samba Samba.
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