CVE-2020-28407
In swtpm before 0.4.2 and 0.5.x before 0.5.1, a local attacker may be able to overwrite arbitrary files via a symlink attack against a temporary file such as TMP2-00.permall.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.28%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In swtpm before 0.4.2 and 0.5.x before 0.5.1, a local attacker may be able to overwrite arbitrary files via a symlink attack against a temporary file such as TMP2-00.permall.
- CVSS 3.1
- 7.1 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
- EPSS
- 0.28% probability · 20th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-59
- Affected
- swtpm project/swtpm
- Source
- cve@mitre.org
EPSS 0.3% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://bugzilla.suse.com/show_bug.cgi?id=1198395Issue Tracking, Patch, Third Party Advisory
- https://github.com/stefanberger/swtpm/releases/tag/v0.4.2Release Notes
- https://github.com/stefanberger/swtpm/releases/tag/v0.5.1Release Notes
- https://bugzilla.suse.com/show_bug.cgi?id=1198395Issue Tracking, Patch, Third Party Advisory
- https://github.com/stefanberger/swtpm/releases/tag/v0.4.2Release Notes
- https://github.com/stefanberger/swtpm/releases/tag/v0.5.1Release Notes
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.