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VuXML IDDescription
ea05c456-a4fd-11ec-90de-1c697aa5a594OpenSSL -- Infinite loop in BN_mod_sqrt parsing certificates

The OpenSSL project reports:

Infinite loop in BN_mod_sqrt() reachable when parsing certificates (High)

The BN_mod_sqrt() function, which computes a modular square root, contains a bug that can cause it to loop forever for non-prime moduli.

Internally this function is used when parsing certificates that contain elliptic curve public keys in compressed form or explicit elliptic curve parameters with a base point encoded in compressed form.

It is possible to trigger the infinite loop by crafting a certificate that has invalid explicit curve parameters.

Since certificate parsing happens prior to verification of the certificate signature, any process that parses an externally supplied certificate may thus be subject to a denial of service attack. The infinite loop can also be reached when parsing crafted private keys as they can contain explicit elliptic curve parameters.

Thus vulnerable situations include:

  • TLS clients consuming server certificates
  • TLS servers consuming client certificates
  • Hosting providers taking certificates or private keys from customers
  • Certificate authorities parsing certification requests from subscribers
  • Anything else which parses ASN.1 elliptic curve parameters

Also any other applications that use the BN_mod_sqrt() where the attacker can control the parameter values are vulnerable to this DoS issue.


Discovery 2022-03-15
Entry 2022-03-16
Modified 2022-03-16
openssl
lt 1.1.1n,1

openssl-devel
lt 3.0.2

openssl-quictls
lt 3.0.2

libressl
lt 3.4.3

libressl-devel
lt 3.5.1

FreeBSD
ge 13.0 lt 13.0_8

ge 12.3 lt 12.3_3

ge 12.2 lt 12.2_14

CVE-2022-0778
https://www.openssl.org/news/secadv/20220315.txt
SA-22:03.openssl
88dfd92f-3b9c-11eb-929d-d4c9ef517024LibreSSL -- NULL pointer dereference

The LibreSSL project reports:

Malformed ASN.1 in a certificate revocation list or a timestamp response token can lead to a NULL pointer dereference.


Discovery 2020-12-08
Entry 2020-12-11
Modified 2020-12-12
libressl
gt 3.2.0 lt 3.2.3

lt 3.1.5

libressl-devel
lt 3.3.1

https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.2.3-relnotes.txt
c82ecac5-6e3f-11e8-8777-b499baebfeafOpenSSL -- Client DoS due to large DH parameter

The OpenSSL project reports:

During key agreement in a TLS handshake using a DH(E) based ciphersuite a malicious server can send a very large prime value to the client. This will cause the client to spend an unreasonably long period of time generating a key for this prime resulting in a hang until the client has finished. This could be exploited in a Denial Of Service attack.


Discovery 2018-06-12
Entry 2018-06-12
Modified 2018-07-24
libressl
libressl-devel
lt 2.6.5

ge 2.7.0 lt 2.7.4

openssl
lt 1.0.2o_4,1

openssl-devel
lt 1.1.0h_2

https://www.openssl.org/news/secadv/20180612.txt
CVE-2018-0732
24673ed7-2bf3-11e7-b291-b499baebfeafLibreSSL -- TLS verification vulnerability

Jakub Jirutka reports:

LibreSSL 2.5.1 to 2.5.3 lacks TLS certificate verification if SSL_get_verify_result is relied upon for a later check of a verification result, in a use case where a user-provided verification callback returns 1, as demonstrated by acceptance of invalid certificates by nginx.


Discovery 2017-04-27
Entry 2017-04-28
libressl
ge 2.5.1 lt 2.5.3_1

libressl-devel
ge 2.5.1 lt 2.5.3_1

http://seclists.org/oss-sec/2017/q2/145
https://github.com/libressl-portable/portable/issues/307
CVE-2017-8301