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CVE-2021-3449

בינונית 5.9

תיאור (מקור, אנגלית)

An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j).

מדדים

CVSS 3.1
5.9 (MEDIUM) מקור הציון: NVD CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS — סבירות ניצול
64% (אחוזון 100) נכון ל-14/10/2026
CWE
CWE-476

מוצרים מושפעים

openssl: openssl; debian: debian linux; freebsd: freebsd; netapp: active iq unified manager; netapp: cloud volumes ontap mediator; netapp: e-series performance analyzer; netapp: oncommand insight; netapp: oncommand workflow automation; netapp: ontap select deploy administration utility; netapp: santricity smi-s provider; netapp: snapcenter; netapp: storagegrid; tenable: log correlation engine; tenable: nessus; tenable: nessus network monitor

קישורים