Covert Timing Channel in Crypto++ - CVE-2022-48570,CVE-2019-14318
Published: December 8, 2019 / Updated: October 4, 2023
Vulnerability identifier: #VU23452
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2022-48570,CVE-2019-14318
CWE-ID: CWE-385
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to scalar multiplication in ecp.cpp (prime field curves, small leakage) and algebra.cpp (binary field curves, large leakage) is not constant time and leaks the bit length of the scalar among other information within the timing side channel in ECDSA signature generation. A local user with ability to measure the duration of hundreds to thousands of signing operations can compute the private key used.
Affected software
Crypto++
Arch Linux
Opensuse
SUSE Linux
Arch Linux
Opensuse
SUSE Linux
How to mitigate CVE-2022-48570,CVE-2019-14318
Install update from vendor's website.
Crypto++ - update to 8.3.0
External References
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00066.html
- https://eprint.iacr.org/2011/232.pdf
- https://github.com/weidai11/cryptopp/issues/869
- https://tches.iacr.org/index.php/TCHES/article/view/7337
- https://github.com/weidai11/cryptopp/releases/tag/CRYPTOPP_8_3_0
- https://github.com/weidai11/cryptopp/releases/tag/CRYPTOPP_8_4_0