CVE-2018-21027
CVE-2018-21027 is a critical-severity vulnerability in Boa 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-119.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 2% (82nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-119
- Affected product: Boa
- Published:
- Last modified:
Description
Boa through 0.94.14rc21 allows remote attackers to trigger an out-of-memory (OOM) condition because malloc is mishandled.
Frequently asked questions
- What is CVE-2018-21027?
- Boa through 0.94.14rc21 allows remote attackers to trigger an out-of-memory (OOM) condition because malloc is mishandled.
- How severe is CVE-2018-21027?
- CVE-2018-21027 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-2018-21027 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-21027?
- CVE-2018-21027 affects Boa. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2018-21027?
- 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-2018-21027 published?
- CVE-2018-21027 was published on 2019-10-11 and last updated on 2026-06-17.
References
- https://github.com/gpg/boa/pull/1
- https://github.com/gpg/boa/pull/1/commits/e139b87835994d007fbd64eead6c1455d7b8cf4e
Affected products (1)
- cpe:2.3:a:boa:boa:*:*:*:*:*:*:*:*
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