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OVAL Definitions
>
OVAL Definition Details
Id
oval:ru.altx-soft.nix:def:145053
[Eng]
Version
4
Class
patch
ALTXid
343881
Language
Russian
Severity
Medium
Title
Обновление DLA-2492-1 -- устранение уязвимостей в openssl
Description
David Benjamin discovered a flaw in the GENERAL_NAME_cmp() function which could cause a NULL dereference, resulting in denial of service.
Family
unix
Platform
Debian 9
Product
openssl
Reference
VENDOR: DLA-2492-1
VENDOR: DLA-2492-1
Id:
DLA-2492-1
Reference:
https://lists.debian.org/debian-lts-announce/2020/debian-lts-announce-202012/msg00020.html
CVE: CVE-2020-1971
CVE: CVE-2020-1971
Id:
CVE-2020-1971
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-1971
Comment
: The X.509 GeneralName type is a generic type for representing different types of names. One of those name types is known as EDIPartyName. OpenSSL provides a function GENERAL_NAME_cmp which compares different instances of a GENERAL_NAME to see if they are equal or not. This function behaves incorrectly when both GENERAL_NAMEs contain an EDIPARTYNAME. A NULL pointer dereference and a crash may occur leading to a possible denial of service attack. OpenSSL itself uses the GENERAL_NAME_cmp function for two purposes: 1) Comparing CRL distribution point names between an available CRL and a CRL distribution point embedded in an X509 certificate 2) When verifying that a timestamp response token signer matches the timestamp authority name (exposed via the API functions TS_RESP_verify_response and TS_RESP_verify_token) If an attacker can control both items being compared then that attacker could trigger a crash. For example if the attacker can trick a client or server into checking a malicious certificate against a malicious CRL then this may occur. Note that some applications automatically download CRLs based on a URL embedded in a certificate. This checking happens prior to the signatures on the certificate and CRL being verified. OpenSSL's s_server, s_client and verify tools have support for the "-crl_download" option which implements automatic CRL downloading and this attack has been demonstrated to work against those tools. Note that an unrelated bug means that affected versions of OpenSSL cannot parse or construct correct encodings of EDIPARTYNAME. However it is possible to construct a malformed EDIPARTYNAME that OpenSSL's parser will accept and hence trigger this attack. All OpenSSL 1.1.1 and 1.0.2 versions are affected by this issue. Other OpenSSL releases are out of support and have not been checked. Fixed in OpenSSL 1.1.1i (Affected 1.1.1-1.1.1h). Fixed in OpenSSL 1.0.2x (Affected 1.0.2-1.0.2w).
CVSSv2 Score:
4.3
Access vector:
NETWORK
Access complexity:
MEDIUM
Authentication:
NONE
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
PARTIAL
CVSSv2 Vector:
AV:N/AC:M/Au:N/C:N/I:N/A:P
CVSSv3 Score:
5.9
Attack vector:
NETWORK
Attack complexity:
HIGH
Privileges required:
NONE
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE:
476 (NULL Pointer Dereference)
References:
https://www.openssl.org/news/secadv/20201208.txt (CONFIRM)
DSA-4807 (DEBIAN)
FreeBSD-SA-20:33 (FREEBSD)
[debian-lts-announce] 20201214 [SECURITY] [DLA 2493-1] openssl1.0 security update (MLIST)
[debian-lts-announce] 20201214 [SECURITY] [DLA 2492-1] openssl security update (MLIST)
https://security.netapp.com/advisory/ntap-20201218-0005/ (CONFIRM)
https://www.tenable.com/security/tns-2020-11 (CONFIRM)
GLSA-202012-13 (GENTOO)
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44676 (CONFIRM)
https://www.oracle.com/security-alerts/cpujan2021.html (MISC)
https://www.tenable.com/security/tns-2021-09 (CONFIRM)
https://security.netapp.com/advisory/ntap-20210513-0002/ (CONFIRM)
https://www.tenable.com/security/tns-2021-10 (CONFIRM)
https://www.oracle.com/security-alerts/cpuApr2021.html (MISC)
N/A (N/A)
[oss-security] 20210914 Re: Oracle Solaris membership in the distros list (MLIST)
https://www.oracle.com/security-alerts/cpuoct2021.html (MISC)
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf (CONFIRM)
https://www.oracle.com/security-alerts/cpuapr2022.html (MISC)
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=f960d81215ebf3f65e03d4d5d857fb9b666d6920 ()
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=2154ab83e14ede338d2ede9bbe5cdfce5d5a6c9e ()
FEDORA-2020-ef1870065a ()
[pulsar-commits] 20201216 [GitHub] [pulsar] phijohns-tibco opened a new issue #8978: OpenSSL needs to be updated to 1.1.1i current version is unsupported. ()
FEDORA-2020-a31b01e945 ()
[tomcat-dev] 20210207 [Bug 65126] New: A security vulnerability cve-2020-1971 in Tomcat dependency Library in version 9.0.40. ()
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