CVE-2020-14968
An attacker can abuse this behavior in an application by creating multiple valid signatures where only one signature should exist.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.96%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An issue was discovered in the jsrsasign package before 8.0.17 for Node.js. Its RSASSA-PSS (RSA-PSS) implementation does not detect signature manipulation/modification by prepending '\0' bytes to a signature (it accepts these modified signatures as valid). An attacker can abuse this behavior in an application by creating multiple valid signatures where only one signature should exist. Also, an attacker might prepend these bytes with the goal of triggering memory corruption issues.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.96% probability · 86th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- kjur/jsrsasign · netapp/max data
- Source
- cve@mitre.org
References
- https://github.com/kjur/jsrsasign/issues/438Exploit, Issue Tracking, Third Party Advisory
- https://github.com/kjur/jsrsasign/releases/tag/8.0.17Release Notes, Third Party Advisory
- https://github.com/kjur/jsrsasign/releases/tag/8.0.18Release Notes, Third Party Advisory
- https://kjur.github.io/jsrsasign/Release Notes, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200724-0001/Third Party Advisory
- https://www.npmjs.com/package/jsrsasignProduct, Third Party Advisory
- https://github.com/kjur/jsrsasign/issues/438Exploit, Issue Tracking, Third Party Advisory
- https://github.com/kjur/jsrsasign/releases/tag/8.0.17Release Notes, Third Party Advisory
- https://github.com/kjur/jsrsasign/releases/tag/8.0.18Release Notes, Third Party Advisory
- https://kjur.github.io/jsrsasign/Release Notes, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200724-0001/Third Party Advisory
- https://www.npmjs.com/package/jsrsasignProduct, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.