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Vulnerability · Published Feb 8, 2023 · Assigned by openssl

CVE-2023-0215Use-after-free following BIO_new_NDEF

High 7.5

In plain English

A high-severity use-after-free in OpenSSL from OpenSSL. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 5.0% (higher than 92% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)5.0%top 7.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

The public API function BIO_new_NDEF is a helper function used for streaming ASN.1 data via a BIO. It is primarily used internally to OpenSSL to support the SMIME, CMS and PKCS7 streaming capabilities, but may also be called directly by end user applications. The function receives a BIO from the caller, prepends a new BIO_f_asn1 filter BIO onto the front of it to form a BIO chain, and then returns the new head of the BIO chain to the caller. Under certain conditions, for example if a CMS recipient public key is invalid, the new filter BIO is freed and the function returns a NULL result indicating a failure. However, in this case, the BIO chain is not properly cleaned up and the BIO passed by the caller still retains internal pointers to the previously freed filter BIO. If the caller then goes on to call BIO_pop() on the BIO then a use-after-free will occur. This will most likely result in a crash. This scenario occurs directly in the internal function B64_write_ASN1() which may cause BIO_new_NDEF() to be called and will subsequently call BIO_pop() on the BIO. This internal function is in turn called by the public API functions PEM_write_bio_ASN1_stream, PEM_write_bio_CMS_stream, PEM_write_bio_PKCS7_stream, SMIME_write_ASN1, SMIME_write_CMS and SMIME_write_PKCS7. Other public API functions that may be impacted by this include i2d_ASN1_bio_stream, BIO_new_CMS, BIO_new_PKCS7, i2d_CMS_bio_stream and i2d_PKCS7_bio_stream. The OpenSSL cms and smime command line applications are similarly affected.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8edk2-aarch6420220126gitbb1bba3d77-4.el8ALSA-2023:2932
AlmaLinux:9edk2-aarch6420221207gitfff6d81270b5-9.el9_2ALSA-2023:2165
AlmaLinux:8edk2-ovmf20220126gitbb1bba3d77-4.el8ALSA-2023:2932
AlmaLinux:9edk2-ovmf20221207gitfff6d81270b5-9.el9_2ALSA-2023:2165
AlmaLinux:9edk2-tools20221207gitfff6d81270b5-9.el9_2ALSA-2023:2165
AlmaLinux:9edk2-tools-doc20221207gitfff6d81270b5-9.el9_2ALSA-2023:2165
AlmaLinux:8openssl1:1.1.1k-9.el8_7ALSA-2023:1405
AlmaLinux:9openssl1:3.0.1-47.el9_1ALSA-2023:0946
AlmaLinux:8openssl-devel1:1.1.1k-9.el8_7ALSA-2023:1405
AlmaLinux:9openssl-devel1:3.0.1-47.el9_1ALSA-2023:0946
AlmaLinux:8openssl-libs1:1.1.1k-9.el8_7ALSA-2023:1405
AlmaLinux:9openssl-libs1:3.0.1-47.el9_1ALSA-2023:0946
AlmaLinux:8openssl-perl1:1.1.1k-9.el8_7ALSA-2023:1405
AlmaLinux:9openssl-perl1:3.0.1-47.el9_1ALSA-2023:0946
Alpine:v3.20openssl3.0.8-r0ALPINE-CVE-2023-0215
Alpine:v3.21openssl3.0.8-r0ALPINE-CVE-2023-0215
Alpine:v3.22openssl3.0.8-r0ALPINE-CVE-2023-0215
Alpine:v3.23openssl3.0.8-r0ALPINE-CVE-2023-0215
Alpine:v3.24openssl3.0.8-r0ALPINE-CVE-2023-0215
Debian:12openssl3.0.8-1DEBIAN-CVE-2023-0215
Debian:13openssl3.0.8-1DEBIAN-CVE-2023-0215
Debian:14openssl3.0.8-1DEBIAN-CVE-2023-0215
Rocky Linux:8openssl1:1.1.1k-9.el8_7RLSA-2023:1405
Rocky Linux:9openssl1:3.0.1-47.el9_1RLSA-2023:0946
Ubuntu:22.04:LTSedk22022.02-3ubuntu0.22.04.4USN-7894-1
Ubuntu:22.04:LTSedk22022.02-3ubuntu0.22.04.4UBUNTU-CVE-2023-0215
Ubuntu:24.04:LTSedk22024.02-2ubuntu0.6USN-7894-1
Ubuntu:22.04:LTSnodejs12.22.9~dfsg-1ubuntu3.3USN-6564-1
Ubuntu:22.04:LTSnodejs12.22.9~dfsg-1ubuntu3.3UBUNTU-CVE-2023-0215
Ubuntu:22.04:LTSopenssl3.0.2-0ubuntu1.8USN-5844-1
Ubuntu:22.04:LTSopenssl3.0.2-0ubuntu1.8UBUNTU-CVE-2023-0215

Affected products (as reported)

VendorProductVersions
OpenSSL OpenSSL 3.0.0 – before 3.0.81.1.1 – before 1.1.1t1.0.2 – before 1.0.2zg

Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References