CVE-2020-1967— Openssl OpenSSL 代码问题漏洞
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I. CVE-2020-1967の基本情報
脆弱性情報
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脆弱性タイトル
Segmentation fault in SSL_check_chain
ソース: NVD (National Vulnerability Database)
脆弱性説明
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).
ソース: NVD (National Vulnerability Database)
CVSS情報
N/A
ソース: NVD (National Vulnerability Database)
脆弱性タイプ
N/A
ソース: NVD (National Vulnerability Database)
脆弱性タイトル
Openssl OpenSSL 代码问题漏洞
ソース: CNNVD (China National Vulnerability Database)
脆弱性説明
OpenSSL是OpenSSL团队的一个开源的能够实现安全套接层（SSLv2/v3）和安全传输层（TLSv1）协议的通用加密库。该产品支持多种加密算法，包括对称密码、哈希算法、安全散列算法等。 OpenSSL 1.1.1d版本、1.1.1e版本和1.1.1f版本中的‘SSL_check_chain()’函数存在代码问题漏洞。远程攻击者可利用该漏洞导致服务器或客户端应用程序崩溃。
ソース: CNNVD (China National Vulnerability Database)
CVSS情報
N/A
ソース: CNNVD (China National Vulnerability Database)
脆弱性タイプ
N/A
ソース: CNNVD (China National Vulnerability Database)
影響を受ける製品
II. CVE-2020-1967の公開POC
| # | POC説明 | ソースリンク | Shenlongリンク |
|---|---|---|---|
| 1 | Proof of concept exploit about OpenSSL signature_algorithms_cert DoS flaw (CVE-2020-1967) | https://github.com/irsl/CVE-2020-1967 | POC詳細 |
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- https://www.oracle.com/security-alerts/cpujan2021.htmlx_refsource_MISC
- https://www.tenable.com/security/tns-2020-04x_refsource_CONFIRM
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44440x_refsource_CONFIRM
- https://www.synology.com/security/advisory/Synology_SA_20_05x_refsource_CONFIRM
- https://www.tenable.com/security/tns-2021-10x_refsource_CONFIRM
- https://www.oracle.com/security-alerts/cpuoct2020.htmlx_refsource_MISC
- https://www.synology.com/security/advisory/Synology_SA_20_05_OpenSSLx_refsource_CONFIRM
- https://www.tenable.com/security/tns-2020-11x_refsource_CONFIRM
- https://www.openssl.org/news/secadv/20200421.txtx_refsource_CONFIRM
- https://www.tenable.com/security/tns-2020-03x_refsource_CONFIRM
- https://www.oracle.com//security-alerts/cpujul2021.htmlx_refsource_MISC
- https://www.oracle.com/security-alerts/cpujul2020.htmlx_refsource_MISC
- https://github.com/irsl/CVE-2020-1967x_refsource_MISC
- https://www.oracle.com/security-alerts/cpuApr2021.htmlx_refsource_MISC
- https://www.oracle.com/security-alerts/cpuoct2021.htmlx_refsource_MISC
- https://security.netapp.com/advisory/ntap-20200424-0003/x_refsource_CONFIRM
- https://security.netapp.com/advisory/ntap-20200717-0004/x_refsource_CONFIRM
- https://security.FreeBSD.org/advisories/FreeBSD-SA-20:11.openssl.ascvendor-advisoryx_refsource_FREEBSD
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00011.htmlvendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00004.htmlvendor-advisoryx_refsource_SUSE
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EXDDAOWSAIEFQNBHWYE6PPYFV4QXGMCD/vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XVEP3LAK4JSPRXFO4QF4GG2IVXADV3SO/vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DDHOAATPWJCXRNFMJ2SASDBBNU5RJONY/vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2020-1967
IV. 関連脆弱性
同じ製品: OpenSSL
- CVE-2026-31790
Incorrect Failure Handling in RSA KEM RSASVE Encapsulation - CVE-2026-31789
Heap Buffer Overflow in Hexadecimal Conversion - CVE-2026-28390
Possible NULL Dereference When Processing CMS KeyTransportRe - CVE-2026-28389
Possible NULL Dereference When Processing CMS KeyAgreeRecipi - CVE-2026-28388
NULL Pointer Dereference When Processing a Delta CRL
同じベンダー: OpenSSL
- CVE-2026-31790
Incorrect Failure Handling in RSA KEM RSASVE Encapsulation - CVE-2026-31789
Heap Buffer Overflow in Hexadecimal Conversion - CVE-2026-28390
Possible NULL Dereference When Processing CMS KeyTransportRe - CVE-2026-28389
Possible NULL Dereference When Processing CMS KeyAgreeRecipi - CVE-2026-28388
NULL Pointer Dereference When Processing a Delta CRL
V. CVE-2020-1967へのコメント
まだコメントはありません