Vulnerability Details : CVE-2021-21828
A heap-based buffer overflow vulnerability exists in the XML Decompression DecodeTreeBlock functionality of AT&T Labs Xmill 0.7. In the default case of DecodeTreeBlock a label is created via CurPath::AddLabel in order to track the label for later reference. An attacker can provide a malicious file to trigger this vulnerability.
Vulnerability category: OverflowMemory Corruption
Products affected by CVE-2021-21828
- cpe:2.3:a:att:xmill:0.7:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-21828
0.34%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 72 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-21828
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
|
8.1
|
HIGH | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
2.2
|
5.9
|
Talos | |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2021-21828
-
The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.Assigned by: talos-cna@cisco.com (Secondary)
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-21828
-
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1291
TALOS-2021-1291 || Cisco Talos Intelligence Group - Comprehensive Threat IntelligenceExploit;Third Party Advisory
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