Vulnerability Details : CVE-2021-32489
An issue was discovered in the _send_secure_msg() function of Yubico yubihsm-shell through 2.0.3. The function does not correctly validate the embedded length field of an authenticated message received from the device because response_msg.st.len=8 can be accepted but triggers an integer overflow, which causes CRYPTO_cbc128_decrypt (in OpenSSL) to encounter an undersized buffer and experience a segmentation fault. The yubihsm-shell project is included in the YubiHSM 2 SDK product.
Vulnerability category: OverflowMemory Corruption
Products affected by CVE-2021-32489
- cpe:2.3:a:yubico:yubihsm-shell:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-32489
0.07%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 33 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-32489
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
3.5
|
LOW | AV:N/AC:M/Au:S/C:N/I:N/A:P |
6.8
|
2.9
|
NIST | |
|
4.4
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H |
0.7
|
3.6
|
MITRE | |
|
4.4
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H |
0.7
|
3.6
|
NIST |
CWE ids for CVE-2021-32489
-
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-32489
-
https://blog.inhq.net/posts/yubico-libyubihsm-vuln2/#second-attack-variant-cve-pending
Yubico libyubihsm Vulnerabilities (CVE-2021-27217) | invd blogExploit;Third Party Advisory
Jump to