Vulnerability Details : CVE-2020-21686
Potential exploit
A stack-use-after-scope issue discovered in expand_mmac_params function in preproc.c in nasm before 2.15.04 allows remote attackers to cause a denial of service via crafted asm file.
Vulnerability category: Denial of service
Products affected by CVE-2020-21686
- cpe:2.3:a:nasm:netwide_assembler:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-21686
0.33%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 52 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-21686
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2020-21686
-
A function returns the address of a stack variable, which will cause unintended program behavior, typically in the form of a crash.Assigned by: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
References for CVE-2020-21686
-
https://bugzilla.nasm.us/show_bug.cgi?id=3392643
3392643 – stack-use-after-scope in expand_mmac_params at asm/preproc.c:4931Exploit;Issue Tracking;Vendor Advisory
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