CVE-2021-37847
crypto/digest.c in Pengutronix barebox through 2021.07.0 leaks timing information because memcmp...
crypto/digest.c in Pengutronix barebox through 2021.07.0 leaks timing information because memcmp is used during digest verification.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
crypto/digest.c in Pengutronix barebox through 2021.07.0 leaks timing information because memcmp is used during digest verification.
- Record
CVE-2021-37847- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Updated
- 2026-11-02
CVE List No score
crypto/digest.c in Pengutronix barebox through 2021.07.0 leaks timing information because memcmp is used during digest verification.
- Record
CVE-2021-37847- Updated
- 2026-11-02
EUVDEUVD-2021-24326 No score
crypto/digest.c in Pengutronix barebox through 2021.07.0 leaks timing information because memcmp is used during digest verification.
- Record
EUVD-2021-24326- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4xwg-632r-5463 No score
crypto/digest.c in Pengutronix barebox through 2021.07.0 leaks timing information because memcmp...
crypto/digest.c in Pengutronix barebox through 2021.07.0 leaks timing information because memcmp is used during digest verification.
- Record
GHSA-4xwg-632r-5463- Updated
- 2026-11-02
OSV
crypto/digest.c in Pengutronix barebox through 2021.07.0 leaks timing information because memcmp is used during digest verification.
- Record
CVE-2021-37847- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-37847 is a high vulnerability (CVSS 7.5) in Pengutronix Barebox, published August 2, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.54%, the 75th percentile. No source names a fixed version.