CVE-2021-39251

Home/CVE/A crafted NTFS image can cause a NULL pointer dereference in ntfs_extent_inode_open in NTFS-3G < 2021.8.22.

CVE

A crafted NTFS image can cause a NULL pointer dereference in ntfs_extent_inode_open in NTFS-3G < 2021.8.22.

HIGH · CVSS 7.8 EPSS 0.00023

Schedule remediation

CVSS base score ≥ 7.0

Sigma rules0 YARA rules0

⬡

Weakness Classification

CWE-20Improper Input Validation
CWE-476NULL Pointer Dereference
CWE-476NULL Pointer Dereference

▤

Affected Products & Versions

tuxera ntfs-3g< 2021.8.22
debian linuxall versions
redhat enterprise linuxall versions
fedoraproject fedoraall versions

▣

Scoring & Timeline

7.8

HIGH · CVSS v3.1 · cve@mitre.org

View on NVD

Attack Vector

Network Adjacent Local Physical

Attack Complexity

Low High

Privileges Required

None Low High

User Interaction

None Required

Scope

Unchanged Changed

Confidentiality

None Low High

Integrity

None Low High

Availability

None Low High

Published to NVD07 Sep 2021 · 03:15 PM

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

SSVC triage · cisa-vulnrichment

Exploitation

none

Automatable

Technical impact

total

SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.

⚑

Vendor Advisories

rhsaRHSA-2022:1759Moderate
msrcCVE-2021-39251
suse-csafopenSUSE-SU-2021:1244-1
suse-csafopenSUSE-SU-2021:2971-1
suse-csafSUSE-SU-2021:2965-1
Show all 8 vendor advisoriessuse-csafSUSE-SU-2021:2971-1
rhsaRHSA-2021:3704Moderate
rhsaRHSA-2021:3703Moderate

🔗

References & Sources

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

http://www.openwall.com/lists/oss-security/2021/08/30/1Mailing ListThird Party Advisory

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=988386Issue TrackingMailing ListThird Party Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=2001649Issue TrackingThird Party Advisory

https://github.com/tuxera/ntfs-3g/releasesRelease NotesThird Party Advisory

https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-q759-8j5v-q5jpThird Party Advisory

https://lists.debian.org/debian-lts-announce/2021/11/msg00013.htmlMailing ListThird Party Advisory

Show all 10 references

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/766ISTT3KCARKFUIQT7N6WV6T63XOKG3/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HSEKTKHO5HFZHWZNJNBJZA56472KRUZI/

https://security.gentoo.org/glsa/202301-01Third Party Advisory

https://www.debian.org/security/2021/dsa-4971Third Party Advisory

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