CVE-2021-34123
CVE-2021-34123 is a critical-severity vulnerability in Atasm Project Atasm with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- EPSS exploit prediction: 1% (48th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Atasm Project Atasm
- Published:
- Last modified:
Description
An issue was discovered on atasm, version 1.09. A stack-buffer-overflow vulnerability in function aprintf() in asm.c allows attackers to execute arbitrary code on the system via a crafted file.
Frequently asked questions
- What is CVE-2021-34123?
- An issue was discovered on atasm, version 1.09. A stack-buffer-overflow vulnerability in function aprintf() in asm.c allows attackers to execute arbitrary code on the system via a crafted file.
- How severe is CVE-2021-34123?
- CVE-2021-34123 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-34123 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-34123?
- CVE-2021-34123 affects Atasm Project Atasm. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-34123?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2021-34123 published?
- CVE-2021-34123 was published on 2023-07-18 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:atasm_project:atasm:1.09:*:*:*:*:*:*:*
More vulnerabilities in Atasm Project Atasm
- CVE-2019-19787 — High (CVSS 7.8): ATasm 1.06 has a stack-based buffer overflow in the get_signed_expression() function in setparse.c via a crafted .m65…
- CVE-2019-19786 — High (CVSS 7.8): ATasm 1.06 has a stack-based buffer overflow in the parse_expr() function in setparse.c via a crafted .m65 file.
- CVE-2019-19785 — High (CVSS 7.8): ATasm 1.06 has a stack-based buffer overflow in the to_comma() function in asm.c via a crafted .m65 file.
All CVEs affecting Atasm Project Atasm →
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