#VU29223 Improper Verification of Cryptographic Signature in jsrsasign - CVE-2020-14966
Published: June 24, 2020
Vulnerability identifier: #VU29223
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-14966
CWE-ID: CWE-347
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
jsrsasign
jsrsasign
Software vendor:
Restaumatic
Restaumatic
Description
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to the affected software allows a malleability in ECDSA signatures by not checking overflows in the length of a sequence and "0" characters appended or prepended to an integer. A remote attacker can cause a security-relevant impact if an application relied on a single canonical signature.
Remediation
Install updates from vendor's website.