FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

OpenSSL -- Multiple vulnerabilities

Affected packages
openssl < 1.1.1k,1

Details

VuXML ID 5a668ab3-8d86-11eb-b8d6-d4c9ef517024
Discovery 2021-03-25
Entry 2021-03-26

The OpenSSL project reports:

High: CA certificate check bypass with X509_V_FLAG_X509_STRICT (CVE-2021-3450)
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.

High: NULL pointer deref in signature_algorithms processing (CVE-2021-3449)
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.

References

CVE Name CVE-2021-3449
CVE Name CVE-2021-3450
URL https://www.openssl.org/news/secadv/20210325.txt