Heap-based Buffer Overflow Affecting squid package, versions [,6.4)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-SQUID-11426408
- published3 Aug 2025
- disclosed1 Aug 2025
- creditStarryNight
Introduced: 1 Aug 2025
NewCVE-2025-54574 (opens in a new tab)How to fix?
Upgrade squid to version 6.4 or higher.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow when delivering URN Trivial-HTTP responses, which allow delivery of up to 4KB of allocated heap memory to the client. An attacker can execute arbitrary code or cause a denial of service by sending specially crafted URN requests.
Workaround
This vulnerability can be mitigated by disabling URN access permissions.