Index
Bugtraq
Pełna lista
Błędy
Sztuczki
Exploity
Dorks list
Tylko z CVE
Tylko z CWE
Bogus
Ranking
CVEMAP
Świeża lista CVE
Producenci
Produkty
Słownik CWE
Sprawdź nr. CVE
Sprawdź nr. CWE
Szukaj
W Bugtraq
W bazie CVE
Po autorze
Po nr. CVE
Po nr. CWE
Po producencie
Po produkcie
RSS
Bugtraq
CVEMAP
CVE Produkty
Tylko Błędy
Tylko Exploity
Tylko Dorks
Więcej
cIFrex
Facebook
Twitter
Donate
O bazie
Lang
Polish
English
Submit
Podatności dla
'Linux'
2021-03-25
CVE-2021-3450
CWE-295
The X509_V_FLAG_X509_STRICT flag enables additional security checks of the certificates present in a certificate chain. It is not set by default. Starting from OpenSSL version 1.1.1h a check to disallow certificates in the chain that have explicitly encoded elliptic curve parameters was added as an additional strict check. An error in the implementation of this check meant that the result of a previous check to confirm that certificates in the chain are valid CA certificates was overwritten. This effectively bypasses the check that non-CA certificates must not be able to issue other certificates. If a "purpose" has been configured then there is a subsequent opportunity for checks that the certificate is a valid CA. All of the named "purpose" values implemented in libcrypto perform this check. Therefore, where a purpose is set the certificate chain will still be rejected even when the strict flag has been used. A purpose is set by default in libssl client and server certificate verification routines, but it can be overridden or removed by an application. In order to be affected, an application must explicitly set the X509_V_FLAG_X509_STRICT verification flag and either not set a purpose for the certificate verification or, in the case of TLS client or server applications, override the default purpose. OpenSSL versions 1.1.1h and newer 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 1.1.1h-1.1.1j).
CVE-2021-3449
CWE-476
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).
>>>
Vendor:
Windriver
4
Produkty
Linux
Bsdos
Platform sa
Vxworks
Copyright
2024
, cxsecurity.com
Back to Top