PT-2021-7819 · At&T · At&T Labs Xmill

Carl Hurd · Published 2021-08-10 · Updated 2024-08-03 · CVE-2021-21828

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions AT&T Labs Xmill version 0.7

Description A heap-based buffer overflow issue exists in the XML Decompression DecodeTreeBlock functionality. This occurs when a label is created via CurPath::AddLabel to track the label for later reference. An attacker can trigger this issue by providing a malicious file, potentially allowing remote execution of arbitrary code.

Recommendations For AT&T Labs Xmill version 0.7, consider disabling the DecodeTreeBlock functionality until a patch is available to prevent exploitation. Restrict access to the XML Decompression feature to minimize the risk of arbitrary code execution. Avoid using the CurPath::AddLabel function in the affected XML Decompression DecodeTreeBlock functionality until the issue is resolved.

Exploit

Fix

Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-120

CWE-787

Related Identifiers

BDU:2023-03273

CVE-2021-21828

Affected Products

At&T Labs Xmill

References · 14

• 🔥 https://talosintelligence.com/vulnerability_reports/TALOS-2021-1291 · Exploit
• https://osv.dev/vulnerability/CVE-2021-21828 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-03273 · Security Note
• https://safe-surf.ru/upload/VULN/VULN-20210813.2.pdf · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-21828 · Security Note
• https://se.com/ww/en/download/document/SEVD-2021-222-02 · Note
• https://t.me/cibsecurity/40759 · Telegram Post
• https://t.me/cvenotify/30942 · Telegram Post
• https://t.me/cibsecurity/27665 · Telegram Post
• https://t.me/cvenotify/19859 · Telegram Post
• https://vuldb.com/?id.181260 · Note
• https://t.me/cvenotify/88695 · Telegram Post
• https://t.me/cvenotify/19872 · Telegram Post
• https://t.me/cvenotify/28899 · Telegram Post