CVE-2021-21827 — Classic Buffer Overflow in Xmill

CWE-120 — Classic Buffer OverflowCWE-787 — Out-of-bounds Write3 documents3 sources
Severity
9.8CRITICALNVD
EPSS
0.5%
top 35.88%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
ATT Xmill
Timeline
PublishedAug 20
Latest updateMay 24

Description

A heap-based buffer overflow vulnerability exists in the XML Decompression DecodeTreeBlock functionality of AT&T Labs Xmill 0.7. Within `DecodeTreeBlock` which is called during the decompression of an XMI file, a UINT32 is loaded from the file and used as trusted input as the length of a buffer. An attacker can provide a malicious file to trigger this vulnerability.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages1 packages

▶NVDatt/xmill0.7

🔴Vulnerability Details

2
GHSA
GHSA-q52q-979x-2v5q: A heap-based buffer overflow vulnerability exists in the XML Decompression DecodeTreeBlock functionality of AT&T Labs Xmill 0↗2022-05-24
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CVEList
CVE-2021-21827: A heap-based buffer overflow vulnerability exists in the XML Decompression DecodeTreeBlock functionality of AT&T Labs Xmill 0↗2021-08-20
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CVE-2021-21827 — Classic Buffer Overflow in ATT Xmill | cvebase