CVE-2020-1967

February 9, 2021 admin CONFIRM, CVE, CVE-2020-1967, Mailing List, vulnerability

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Summary:

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. This could be exploited by a malicious peer in a Denial of Service attack. OpenSSL version 1.1.1d, 1.1.1e, and 1.1.1f are affected by this issue. This issue did not affect OpenSSL versions prior to 1.1.1d. Fixed in OpenSSL 1.1.1g (Affected 1.1.1d-1.1.1f).

Reference Links(if available):

https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=eb563247aef3e83dda7679c43f9649270462e5b1

https://www.openssl.org/news/secadv/20200421.txt

https://security.FreeBSD.org/advisories/FreeBSD-SA-20:11.openssl.asc

https://www.debian.org/security/2020/dsa-4661

http://www.openwall.com/lists/oss-security/2020/04/22/2

CVSS Score (if available)

v2: / MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P

v3: / HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

RedPacket Security

CVE-2020-1967

Summary:

Reference Links(if available):

CVSS Score (if available)

Links to Exploits(if available)

Summary:

Reference Links(if available):

CVSS Score (if available)

Links to Exploits(if available)

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