CVE-2021-44142

Summary

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.

Affected Software

Weaknesses

• CWE-125: CWE-125 Out-of-bounds Read
• CWE-787: CWE-787 Out-of-bounds Write

ADP Enrichment

CVE Program Container

Additional References

• https://www.kb.cert.org/vuls/id/119678
• 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
• https://bugzilla.samba.org/show_bug.cgi?id=14914
• https://security.gentoo.org/glsa/202309-06

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: total

References

• 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
• https://bugzilla.samba.org/show_bug.cgi?id=14914
• https://security.gentoo.org/glsa/202309-06

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