CVE-2021-3434: zephyrproject-rtos zephyr Stack-based Buffer Overflow
CVSS: 7.8v3.1HighModified
Published 28-06-2022Last modified 17-09-2024
Vulnerability summary
CVE-2021-3434 is a high (CVSS 7.8) Stack-based Buffer Overflow vulnerability in zephyrproject-rtos zephyr. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 9.8% of scored vulnerabilities.
CVSS score
7.8/10
010
High · v3.1 (NVD)EPSS score
0.21%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 28-06-2022PublishedVulnerability first disclosed.
- 17-09-2024Last modifiedVulnerability information updated.
Description
Stack based buffer overflow in le_ecred_conn_req(). Zephyr versions >= v2.5.0 Stack-based Buffer Overflow (CWE-121). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-8w87-6rfp-cfrm
CVSS metrics
3 scores · 2 sources · 2 versionsHigh 7.8Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSources2 sources · 4.9–7.8
- CVE.orgCNA4.9MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:LDiffers
Medium 4.6Preferred score · NVD (NIST)
AV:L/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
0.21%
Chance of exploitation in the next 30 days
Percentile
10%
Versus all other CVEs
30-day change
0.00 pp
From 0.21% on 20-09-2026
20-09-202620-10-2026
EPSS score0.21%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
Zephyrproject1 product
- zephyr≥ 2.5.0, < 2.6.0
Zephyrproject-rtos1 product
- zephyr≥ v2.5.0, < unspecified | ≥ v2.6.0, < unspecified
2 vendors · 2 products
References
1 links- github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-8w87-6rfp-cfrmX Refsource MISCVendor Advisory