CVE-2025-32052

What it actually does

Heap buffer over-read in sniff_unknown() allows out-of-bounds memory access, potentially disclosing limited heap contents or causing application instability.

Why it matters to the business

Organizations running the listed curl packages on RHEL 8.2 face a moderate risk of information exposure or denial-of-service from remote attackers, though low exploit prevalence and absence from KEV limit immediate operational disruption.

How an attack unfolds

An unauthenticated remote attacker sends specially crafted network data to an application using the vulnerable library; the malformed input reaches sniff_unknown(), which performs an out-of-bounds read on the heap, returning limited memory contents or triggering a crash.

How to fix it

Update all listed packages to the fixed versions: curl, curl-debuginfo, curl-debugsource, curl-minimal-debuginfo, libcurl, libcurl-debuginfo, libcurl-devel, libcurl-minimal, and libcurl-minimal-debuginfo to 0:7.61.1-12.el8_2.2 on Red Hat Enterprise Linux 8.2 EUS baseos.

How to confirm the fix worked

Confirm installed package versions match the fixed releases using rpm -q, then perform functional regression testing of HTTP client operations and monitor for crashes or unexpected memory behavior.

Typical attack path

1. Identify a network-accessible service using the affected curl/libcurl packages
2. Craft and transmit a request containing data that exercises the unknown-content sniffing path
3. Trigger the over-read to obtain heap memory fragments or induce instability

How to detect it

Examine application and system logs for segmentation faults or abnormal terminations in curl-using processes; correlate with inbound network traffic containing unusual content-type or payload patterns around the publication date and afterward.

What your security team should do

• Apply the specified package updates across all RHEL 8.2 EUS systems within standard change windows
• Review and restrict unnecessary exposure of services that rely on libcurl for external data handling
• Enable memory-safety tooling and crash reporting for affected applications