NULL pointer dereference in OpenSSL
CVE-2023-0217
An invalid pointer dereference on read can be triggered when an application tries to check a malformed DSA public key by the EVP_PKEY_public_check() function. This will most likely lead to an application crash. This function can be called on public keys supplied from untrusted sources which could allow an attacker to cause a denial of service attack. The TLS implementation in OpenSSL does not call this function but applications might call the function if there are additional security requirements imposed by standards such as FIPS 140-3.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.018 (78.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 78.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000
Affected products
- OpenSSL — versions 3.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openssl.org/news/secadv/20230207.txt (vendor-advisory, Vendor Advisory)
- git.openssl.org/gitweb/ (patch)
- security.gentoo.org/glsa/202402-08
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2023-0217?
- CVE-2023-0217 is a high-severity vulnerability in OpenSSL, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2023-02-08.
- How severe is CVE-2023-0217?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2023-0217 known to be exploited?
- 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.