NULL pointer dereference in OpenSSL
CVE-2024-0727
Issue summary: Processing a maliciously formatted PKCS12 file may lead OpenSSL to crash leading to a potential Denial of Service attack Impact summary: Applications loading files in the PKCS12 format from untrusted sources might terminate abruptly. A file in PKCS12 format can contain certificates and keys and may come from an untrusted source. The PKCS12 specification allows certain fields to be NULL, but OpenSSL does not correctly check for this case. This can lead to a NULL pointer dereference that results in OpenSSL crashing. If an application processes PKCS12 files from an untrusted source using the OpenSSL APIs then that application will be vulnerable to this issue. OpenSSL APIs that are vulnerable to this are: PKCS12_parse(), PKCS12_unpack_p7data(), PKCS12_unpack_p7encdata(), PKCS12_unpack_authsafes() and PKCS12_newpass(). We have also fixed a similar issue in SMIME_write_PKCS7(). However since this function is related to writing data we do not consider it security significant. The FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.032 (87.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.032 · newest: 0.032 · change: 0.000
Affected products
- OpenSSL — versions 3.2.0, 3.1.0, 3.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openssl.org/news/secadv/20240125.txt (vendor-advisory, Vendor Advisory)
- github.com/openssl/openssl/commit/775acfdbd0c6af9ac855f34969cdab0c0c90844a (Patch, patch)
- github.com/openssl/openssl/commit/d135eeab8a5dbf72b3da5240bab9ddb7678dbd2c (Patch, patch)
- github.com/openssl/openssl/commit/09df4395b5071217b76dc7d3d2e630eb8c5a79c2 (Patch, patch)
- github.openssl.org/openssl/extended-releases/commit/03b3941d60c4bce58fab69a0c22… (Patch, patch)
- github.openssl.org/openssl/extended-releases/commit/aebaa5883e31122b404e450732d… (Patch, patch)
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2024-0727?
- CVE-2024-0727 is a medium-severity vulnerability in OpenSSL, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2024-01-26.
- How severe is CVE-2024-0727?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2024-0727 known to be exploited?
- 9 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.