CVE-2023-2650 (GCVE-0-2023-2650)
Vulnerability from cvelistv5
Published
2023-05-30 13:40
Modified
2025-03-19 15:25
Severity ?
CWE
  • inefficient algorithmic complexity
Summary
Issue summary: Processing some specially crafted ASN.1 object identifiers or data containing them may be very slow. Impact summary: Applications that use OBJ_obj2txt() directly, or use any of the OpenSSL subsystems OCSP, PKCS7/SMIME, CMS, CMP/CRMF or TS with no message size limit may experience notable to very long delays when processing those messages, which may lead to a Denial of Service. An OBJECT IDENTIFIER is composed of a series of numbers - sub-identifiers - most of which have no size limit. OBJ_obj2txt() may be used to translate an ASN.1 OBJECT IDENTIFIER given in DER encoding form (using the OpenSSL type ASN1_OBJECT) to its canonical numeric text form, which are the sub-identifiers of the OBJECT IDENTIFIER in decimal form, separated by periods. When one of the sub-identifiers in the OBJECT IDENTIFIER is very large (these are sizes that are seen as absurdly large, taking up tens or hundreds of KiBs), the translation to a decimal number in text may take a very long time. The time complexity is O(n^2) with 'n' being the size of the sub-identifiers in bytes (*). With OpenSSL 3.0, support to fetch cryptographic algorithms using names / identifiers in string form was introduced. This includes using OBJECT IDENTIFIERs in canonical numeric text form as identifiers for fetching algorithms. Such OBJECT IDENTIFIERs may be received through the ASN.1 structure AlgorithmIdentifier, which is commonly used in multiple protocols to specify what cryptographic algorithm should be used to sign or verify, encrypt or decrypt, or digest passed data. Applications that call OBJ_obj2txt() directly with untrusted data are affected, with any version of OpenSSL. If the use is for the mere purpose of display, the severity is considered low. In OpenSSL 3.0 and newer, this affects the subsystems OCSP, PKCS7/SMIME, CMS, CMP/CRMF or TS. It also impacts anything that processes X.509 certificates, including simple things like verifying its signature. The impact on TLS is relatively low, because all versions of OpenSSL have a 100KiB limit on the peer's certificate chain. Additionally, this only impacts clients, or servers that have explicitly enabled client authentication. In OpenSSL 1.1.1 and 1.0.2, this only affects displaying diverse objects, such as X.509 certificates. This is assumed to not happen in such a way that it would cause a Denial of Service, so these versions are considered not affected by this issue in such a way that it would be cause for concern, and the severity is therefore considered low.
References
openssl-security@openssl.org http://www.openwall.com/lists/oss-security/2023/05/30/1 Mailing List
openssl-security@openssl.org https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=423a2bc737a908ad0c77bda470b2b59dc879936b Mailing List, Patch
openssl-security@openssl.org https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=853c5e56ee0b8650c73140816bb8b91d6163422c Broken Link
openssl-security@openssl.org https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=9e209944b35cf82368071f160a744b6178f9b098 Mailing List, Patch
openssl-security@openssl.org https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=db779b0e10b047f2585615e0b8f2acdf21f8544a Mailing List, Patch
openssl-security@openssl.org https://lists.debian.org/debian-lts-announce/2023/06/msg00011.html Mailing List, Third Party Advisory
openssl-security@openssl.org https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0009 Third Party Advisory
openssl-security@openssl.org https://security.gentoo.org/glsa/202402-08
openssl-security@openssl.org https://security.netapp.com/advisory/ntap-20230703-0001/ Third Party Advisory
openssl-security@openssl.org https://security.netapp.com/advisory/ntap-20231027-0009/
openssl-security@openssl.org https://www.debian.org/security/2023/dsa-5417 Third Party Advisory
openssl-security@openssl.org https://www.openssl.org/news/secadv/20230530.txt Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 http://www.openwall.com/lists/oss-security/2023/05/30/1 Mailing List
af854a3a-2127-422b-91ae-364da2661108 https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=423a2bc737a908ad0c77bda470b2b59dc879936b Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=853c5e56ee0b8650c73140816bb8b91d6163422c Broken Link
af854a3a-2127-422b-91ae-364da2661108 https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=9e209944b35cf82368071f160a744b6178f9b098 Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=db779b0e10b047f2585615e0b8f2acdf21f8544a Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108 https://lists.debian.org/debian-lts-announce/2023/06/msg00011.html Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0009 Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://security.gentoo.org/glsa/202402-08
af854a3a-2127-422b-91ae-364da2661108 https://security.netapp.com/advisory/ntap-20230703-0001/ Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://security.netapp.com/advisory/ntap-20231027-0009/
af854a3a-2127-422b-91ae-364da2661108 https://www.debian.org/security/2023/dsa-5417 Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://www.openssl.org/news/secadv/20230530.txt Vendor Advisory
Impacted products
Vendor Product Version
OpenSSL OpenSSL Version: 3.1.1   ≤
Version: 3.0.0   ≤
Version: 1.1.1   < 1.1.1u
Version: 1.0.2   < 1.0.2zh
 Create a notification for this product.
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This is assumed to not happen in such a way\\nthat it would cause a Denial of Service, so these versions are considered\\nnot affected by this issue in such a way that it would be cause for concern,\\nand the severity is therefore considered low.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Issue summary: Processing some specially crafted ASN.1 object identifiers or\u003cbr\u003edata containing them may be very slow.\u003cbr\u003e\u003cbr\u003eImpact summary: Applications that use OBJ_obj2txt() directly, or use any of\u003cbr\u003ethe OpenSSL subsystems OCSP, PKCS7/SMIME, CMS, CMP/CRMF or TS with no message\u003cbr\u003esize limit may experience notable to very long delays when processing those\u003cbr\u003emessages, which may lead to a Denial of Service.\u003cbr\u003e\u003cbr\u003eAn OBJECT IDENTIFIER is composed of a series of numbers - sub-identifiers -\u003cbr\u003emost of which have no size limit.  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      "cveMetadata": "{\"cveId\": \"CVE-2023-2650\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-03-19T15:25:32.613Z\", \"dateReserved\": \"2023-05-11T06:09:26.543Z\", \"assignerOrgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"datePublished\": \"2023-05-30T13:40:11.963Z\", \"assignerShortName\": \"openssl\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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