TI-2021-02806 Aliases CVE-2021-3889 GHSA-842w-vjwh-872m

Use of Out-of-range Pointer Offset in bfabiszewski/libmobi

LOW 38CWE-823Published 2021-10-19 · Updated 2024-08-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

libmobi is vulnerable to Use of Out-of-range Pointer Offset

Why it matters now

EPSS 0.01291 70th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed bfabiszewski/libmobi (bfabiszewski): 0.8

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
bfabiszewski	bfabiszewski/libmobi	before 0.8	0.8	Patch available	CNA

bfabiszewski/libmobi Vendorbfabiszewski Affected before 0.8 Fixed in 0.8 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:libmobi_project:libmobi::::::::	before 0.8	Vulnerable	bfabiszewski

cpe:2.3:a:libmobi_project:libmobi:*:*:*:*:*:*:*:* Versions before 0.8 Vulnerable ·bfabiszewski

Remediation

Fix · CNA bfabiszewski/libmobi (bfabiszewski) Fixed in 0.8

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2021-10-19
bfabiszewski/libmobi 0.8
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2021-02805 Use of Out-of-range Pointer Offset in bfabiszewski/libmobiPriority LOW 38
Show all 2 records →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2021-3889
2026-10-03 Alias added: GHSA-842w-vjwh-872m

References

Exploit 1

https://huntr.dev/bounties/efb3e261-3f7d-4a45-8114-e0ace6b21516

Patch 1

https://github.com/bfabiszewski/libmobi/commit/bec783e6212439a335ba6e8df7ab8ed610ca9a21

TI-2021-02684 Out-of-bounds Write in bfabiszewski/libmobi CVSS 3.1CRITICAL 9.8
TI-2021-02803 Out-of-bounds Read in bfabiszewski/libmobi CVSS 3.1CRITICAL 9.8
TI-2018-08389 The mobi_decode_font_resource function in util.c in Libmobi 0.3 allows remote attackers… CVSS 3.0HIGH 8.8
TI-2018-08164 The mobi_decompress_lz77 function in compression.c in Libmobi 0.3 allows remote attackers… CVSS 3.0HIGH 8.8
TI-2018-08387 The mobi_pk1_decrypt function in encryption.c in Libmobi 0.3 allows remote attackers to… CVSS 3.0HIGH 8.8
TI-2021-02805 Use of Out-of-range Pointer Offset in bfabiszewski/libmobi CVSS 3.1HIGH 8.1

See all 20 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences