CVE-2021-43398 Information disclosure in n/a
Timing leakage in Crypto++ may disclose private key length, though the vendor disputes this as intentional behavior.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-43398?
CVE-2021-43398 is a medium-severity vulnerability in n/a, published on 4 Nov 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Crypto++ (aka Cryptopp) 8.6.0 and earlier contains a timing leakage in MakePublicKey(). There is a clear correlation between execution time and private key length, which may cause disclosure of the length information of the private key. This might allow attackers to conduct timing attacks. NOTE: this report is disputed by the vendor and multiple third parties. The execution-time differences are intentional. A user may make a choice of a longer key as a tradeoff between strength and performance. In making this choice, the amount of information leaked to an adversary is of infinitesimal value
Weakness: CWE-203
Which versions are affected by CVE-2021-43398?
It affects 1 product.
Products include Cryptopp Crypto\+\+.
How do I fix CVE-2021-43398?
No fix has been published for CVE-2021-43398 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-43398 being exploited?
There is no known exploitation of CVE-2021-43398 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-86rq-fj99-chhj.