Integer overflow in Fujitsu M10-1
CVE-2021-23840
Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument in some cases where the input length is close to the maximum permissable length for an integer on the platform. In such cases the re…
Vulnerability class: Integer Overflow
EPSS: 0.498 (98.8th percentile) — read the EPSS interpretation.
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.
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- openssl-security@openssl.org (Vendor Advisory)
- openssl-security@openssl.org
- openssl-security@openssl.org
- openssl-security@openssl.org (vendor-advisory, Third Party Advisory)
- openssl-security@openssl.org (vendor-advisory, Third Party Advisory)
- openssl-security@openssl.org (Patch, Third Party Advisory)
- openssl-security@openssl.org (Third Party Advisory)
- openssl-security@openssl.org (Third Party Advisory)
- openssl-security@openssl.org (Third Party Advisory)
- openssl-security@openssl.org (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-23840?
- CVE-2021-23840 is a high-severity vulnerability in Fujitsu M10-1, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2021-02-16.
- How severe is CVE-2021-23840?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-23840 known to be exploited?
- 15 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.