- Vulnerabilities 86,726
OpenSSL: Segmentation fault in SSL_check_chain (CVE-2020-1967) (Windows)
Published: 2020-04-22 06:05:59
CVE Author: NIST National Vulnerability Database
CVSS Base Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:P
Summary:
OpenSSL server or client applications are prone to a
denial-of-service vulnerability.
Detection Method:
Checks if a vulnerable version is present on the target host.
Technical Details:
Server or client applications that call the SSL_check_chain() function
during or after a TLS 1.3 handshake may crash due to a NULL pointer dereference as a result of incorrect
handling of the 'signature_algorithms_cert' TLS extension. The crash occurs if an invalid or unrecognised
signature algorithm is received from the peer.
Impact:
This could be exploited by a malicious peer in a Denial of
Service attack.
Affected Versions:
OpenSSL versions 1.1.1d, 1.1.1e, and 1.1.1f.
This issue does not impact OpenSSL versions prior to 1.1.1d.
Recommendations:
Update OpenSSL to version 1.1.1g or later. See the references for more details.
Detection Type:
Remote Banner
Solution Type:
Vendor Patch
https://nvd.nist.gov/vuln/detail/CVE-2020-1967
https://www.openssl.org/news/secadv/20200421.txt
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=eb563247aef3e83dda7679c43f9649270462e5b1
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