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CVE-2021-44142

HIGHCVSS 8.8/10EPSS 74.04%

Last modified

CVE-2021-44142 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 74.04% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
74.04%

99.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
SambaSamba< 4.13.17
SambaSamba>= 4.14.0, < 4.14.12
SambaSamba>= 4.15.0, < 4.15.5
DebianDebian Linux10.0
DebianDebian Linux11.0
CanonicalUbuntu Linux14.04
CanonicalUbuntu Linux16.04
CanonicalUbuntu Linux18.04
CanonicalUbuntu Linux20.04
CanonicalUbuntu Linux21.10
SynologyDiskstation Manager>= 6.2, < 6.2.4-25556.4
FedoraprojectFedora34
FedoraprojectFedora35
RedhatCodeready Linux BuilderAll versions
RedhatGluster Storage3.5
RedhatVirtualization Host4.0
RedhatEnterprise Linux7.0
RedhatEnterprise Linux8.0
RedhatEnterprise Linux Desktop7.0
RedhatEnterprise Linux Eus8.2
RedhatEnterprise Linux Eus8.4
RedhatEnterprise Linux For Ibm Z Systems7.0
RedhatEnterprise Linux For Ibm Z Systems8.0
RedhatEnterprise Linux For Ibm Z Systems Eus8.2
RedhatEnterprise Linux For Ibm Z Systems Eus8.4
RedhatEnterprise Linux For Power Big Endian7.0
RedhatEnterprise Linux For Power Little Endian7.0
RedhatEnterprise Linux For Power Little Endian8.0
RedhatEnterprise Linux For Power Little Endian Eus8.2
RedhatEnterprise Linux For Power Little Endian Eus8.4
RedhatEnterprise Linux For Scientific Computing7.0
RedhatEnterprise Linux Resilient Storage7.0
RedhatEnterprise Linux Server7.0
RedhatEnterprise Linux Server8.1
RedhatEnterprise Linux Server Aus8.2
RedhatEnterprise Linux Server Aus8.4
RedhatEnterprise Linux Server Tus8.2
RedhatEnterprise Linux Server Tus8.4
RedhatEnterprise Linux Server Update Services For Sap Solutions8.1
RedhatEnterprise Linux Server Update Services For Sap Solutions8.2
RedhatEnterprise Linux Server Update Services For Sap Solutions8.4
RedhatEnterprise Linux Workstation7.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-44142?
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.
How severe is CVE-2021-44142?
CVE-2021-44142 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 74.04% probability of exploitation in the next 30 days.
How do I fix CVE-2021-44142?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-44142?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST