Vulnerability Details : CVE-2021-39520
An issue was discovered in libjpeg through 2020021. A NULL pointer dereference exists in the function BlockBitmapRequester::PushReconstructedData() located in blockbitmaprequester.cpp. It allows an attacker to cause Denial of Service.
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2021-39520
- cpe:2.3:a:jpeg:libjpeg:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-39520
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 32 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-39520
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:N/A:P |
8.6
|
2.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
NIST |
CWE ids for CVE-2021-39520
-
The product dereferences a pointer that it expects to be valid but is NULL.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-39520
-
https://github.com/thorfdbg/libjpeg/issues/34
Segmentation fault in blockbitmaprequester.cpp:1182 · Issue #34 · thorfdbg/libjpeg · GitHubExploit;Issue Tracking;Patch;Third Party Advisory
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