Information disclosure in Botan - CVE-2018-12435
Published: June 18, 2018 / Updated: June 20, 2018
Vulnerability identifier: #VU13398
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2018-12435
CWE-ID: CWE-200
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Randombit
Affected software:
Botan
Botan
Detailed vulnerability description
The vulnerability allows a local attacker to obtain potentially sensitive information.
The vulnerability exists in the Botan library due to a leakage of information through memory caches when the library uses a private key to create Elliptic Curve Digital Signature Algorithm (ECDSA) signatures as demonstrayed in the dsa/dsa.cpp, ec_group/ec_group.cpp, and ecdsa/ecdsa.cpp source code files. A local attacker can conduct a memory-cache side-channel attack and recover sensitive information, such ECDSA private keys, which could be used to conduct further attacks.
How to mitigate CVE-2018-12435
Update to version 2.7.0.