Vulnerability Details : CVE-2021-34845
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handling of Annotation objects. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-14034.
Vulnerability category: Execute code
Products affected by CVE-2021-34845
- cpe:2.3:a:foxit:pdf_reader:*:*:*:*:*:*:*:*
- cpe:2.3:a:foxitsoftware:pdf_editor:*:*:*:*:*:*:*:*
- cpe:2.3:a:foxitsoftware:pdf_editor:11.0.0.49893:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-34845
1.71%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 88 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-34845
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
NIST | |
|
7.8
|
HIGH | CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
Zero Day Initiative | |
|
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST |
CWE ids for CVE-2021-34845
-
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by: zdi-disclosures@trendmicro.com (Primary)
References for CVE-2021-34845
-
https://www.foxit.com/support/security-bulletins.html
Security Bulletins | Foxit SoftwareVendor Advisory
-
https://www.zerodayinitiative.com/advisories/ZDI-21-927/
ZDI-21-927 | Zero Day InitiativeThird Party Advisory;VDB Entry
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