How severe is CVE-2017-9334?

CVE-2017-9334 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2017-9334 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-9334?

CVE-2017-9334 affects Call-cc Chicken. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-9334?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2017-9334 published?

CVE-2017-9334 was published on 2017-06-01 and last updated on 2026-06-17.

CVE-2017-9334

CVE-2017-9334 is a high-severity vulnerability in Call-cc Chicken with a CVSS 3.x base score of 7.5. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Call-cc Chicken
Published: 2017-06-01
Last modified: 2026-06-17

Description

An incorrect "pair?" check in the Scheme "length" procedure results in an unsafe pointer dereference in all CHICKEN Scheme versions prior to 4.13, which allows an attacker to cause a denial of service by passing an improper list to an application that calls "length" on it.

Frequently asked questions

What is CVE-2017-9334?: An incorrect "pair?" check in the Scheme "length" procedure results in an unsafe pointer dereference in all CHICKEN Scheme versions prior to 4.13, which allows an attacker to cause a denial of service by passing an improper list to an application that calls "length" on it.
How severe is CVE-2017-9334?: CVE-2017-9334 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2017-9334 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-9334?: CVE-2017-9334 affects Call-cc Chicken. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-9334?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-9334 published?: CVE-2017-9334 was published on 2017-06-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:call-cc:chicken:*:*:*:*:*:*:*:*

More vulnerabilities in Call-cc Chicken

CVE-2022-45145 — Critical (CVSS 9.8): egg-compile.scm in CHICKEN 5.x before 5.3.1 allows arbitrary OS command execution during package installation via…
CVE-2014-6310 — Critical (CVSS 9.8): Buffer overflow in CHICKEN 4.9.0 and 4.9.0.1 may allow remote attackers to execute arbitrary code via the 'select'…
CVE-2012-6125 — Critical (CVSS 9.8): Chicken before 4.8.0 is susceptible to algorithmic complexity attacks related to hash table collisions.
CVE-2016-6830 — Critical (CVSS 9.8): The "process-execute" and "process-spawn" procedures in CHICKEN Scheme used fixed-size buffers for holding the…
CVE-2013-2075 — High (CVSS 8.8): Multiple buffer overflows in the (1) R5RS char-ready, (2) tcp-accept-ready, and (3) file-select procedures in Chicken…
CVE-2013-2024 — High (CVSS 8.8): OS command injection vulnerability in the "qs" procedure from the "utils" module in Chicken before 4.9.0.

All CVEs affecting Call-cc Chicken →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →