CVE-2026-59692

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During a DTLS handshake, the peer certificate Subject Distinguished Name is printed into a fixed-size 2048-byte stack buffer without bounds checking. 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The following measures can reduce risk:\n\n1. If WebRTC/DTLS functionality is not required, remove the DTLS plugin shared object from the GStreamer plugins directory (typically /usr/lib64/gstreamer-1.0/libgstdtls.so).\n2. Restrict network access to WebRTC/DTLS endpoints to trusted peers only via firewall rules.\n3. Deploy GStreamer WebRTC services behind a reverse proxy or media server that validates DTLS certificates before forwarding."}], "timeline": [{"lang": "en", "time": "2026-07-06T00:00:00.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-07-08T00:00:00.000Z", "value": "Made public."}], "credits": [{"lang": "en", "value": "Red Hat would like to thank Clouditera Security (Clouditera), NSFOCUS (NSFOCUS), and Z.ai Security (Z.ai) for reporting this issue."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-11-04T23:09:29.165Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-09T13:33:46.281179Z", "id": "CVE-2026-59692", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-09T14:39:16.678Z"}}]}}

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{"acknowledgement": "Red Hat would like to thank Clouditera Security (Clouditera), NSFOCUS (NSFOCUS), and Z.ai Security (Z.ai) for reporting this issue.", "bugzilla": {"description": "gstreamer: gstreamer: DTLS certificate Subject DN stack buffer overflow in openssl_verify_callback", "id": "2497344", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2497344"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-121", "details": ["A stack buffer overflow vulnerability was found in GStreamer's DTLS plugin. During a DTLS handshake, the peer certificate Subject Distinguished Name is printed into a fixed-size 2048-byte stack buffer without bounds checking. A remote unauthenticated attacker can send a certificate with an oversized Subject DN that exceeds the buffer, causing a stack buffer overflow and process crash, resulting in denial of service."], "mitigation": {"lang": "en:us", "value": "There is no complete mitigation for this vulnerability. The following measures can reduce risk:\n1. If WebRTC/DTLS functionality is not required, remove the DTLS plugin shared object from the GStreamer plugins directory (typically /usr/lib64/gstreamer-1.0/libgstdtls.so).\n2. Restrict network access to WebRTC/DTLS endpoints to trusted peers only via firewall rules.\n3. Deploy GStreamer WebRTC services behind a reverse proxy or media server that validates DTLS certificates before forwarding."}, "name": "CVE-2026-59692", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "gstreamer1-plugins-bad-free", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Affected", "package_name": "gstreamer-plugins-bad-free", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "gstreamer1-plugins-bad-free", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "gstreamer-plugins-bad-free", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "gstreamer1-plugins-bad-free", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "gstreamer1-plugins-bad-free", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-59692\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-59692\nhttps://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/99\nhttps://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5172"], "statement": "This vulnerability is rated as Important severity because it is remotely triggerable without authentication or user interaction during a DTLS handshake. However, the actual impact is limited to denial of service. Remote code execution is not achievable because X509_NAME_print_ex() escapes all binary and control characters to printable ASCII sequences, preventing arbitrary byte injection into the overflow. Combined with stack canary protection (-fstack-protector-strong) in Red Hat builds, return address corruption cannot be exploited. The DTLS plugin is shipped as part of gstreamer1-plugins-bad-free in Red Hat Enterprise Linux 8, 9, 10, and RHIVOS. It is used by GStreamer WebRTC pipelines.", "threat_severity": "Important"}

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