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Overview 1 match · 0 in Waratek scope · 0 protected · 0 exploited · 0 CISA KEV

1match 0in Waratek scope0.0% 0protected0.0% 0exploited0.0% 0CISA KEV0.0%

Protected by Waratek 0 0.0% Rule in development 0 0.0% Mitigation candidate 0 0.0% No exploit published 0 0.0% Outside Waratek scope 1 100.0% Not applicable 0 0.0% Withdrawn CVE 0 0.0%

Critical 0 0.0% High 0 0.0% Medium 1 100.0% Low 0 0.0% None 0 0.0% Unknown 0 0.0%

blocked by ARMR today 0 0.0% partly blocked 0 0.0% not blocked 1 100.0% not established 0 0.0% unrecorded 0 0.0%

Exploited 0 0.0% Working exploit published 0 0.0% Proof of concept only 1 100.0% Forecast only 0 0.0% No public exploit 0 0.0%

split by StatusSeverityProtectionExploit maturity peak 1 / month

Mar 211 Outside Waratek scope1 Medium1 not blocked1 Proof of concept only1

Mar 21

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CVE	Severity	Published▾	Status	Exploitation	Description
CVE-2021-3449	Medium	2021-03-25	Outside Waratek scope	Proof of concept only	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).

CVE

Severity

Published▾

Status

Exploitation

Description

CVE-2021-3449

Medium

2021-03-25

Outside Waratek scope

Proof of concept only

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).