CVE-2023-2650: Possible DoS translating ASN.1 object identifiers
Vendor fix available · Affected: OpenSSL · Exploitation: likely to be exploited (10% or more)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 99% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- OpenSSL · OpenSSLfrom 3.1.1 before 3.1.1; from 3.0.0 before 3.0.9; from 1.1.1 before 1.1.1u; from 1.0.2 before 1.0.2zh
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
CoverageNo articles yet
No CyberSIXT article names CVE-2023-2650 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.
References
- NVD entrynvd.nist.gov
- CVE recordcve.org
- Weakness CWE-770cwe.mitre.org
- Vendor advisoryopenssl.org
- Patchgit.openssl.org
- Patchgit.openssl.org
- Patchgit.openssl.org
- Patchgit.openssl.org
- openwall.com/lists/oss-security/2023/05/30/1openwall.com
- debian.org/security/2023/dsa-5417debian.org
- lists.debian.org/debian-lts-announce/2023/06/msg00011.htmllists.debian.org
- psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0009psirt.global.sonicwall.com
- security.netapp.com/advisory/ntap-20230703-0001security.netapp.com
- security.netapp.com/advisory/ntap-20231027-0009security.netapp.com
- security.gentoo.org/glsa/202402-08security.gentoo.org
3 more references are in the CVE record.