Information disclosure in Botan
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-40529 |
| CWE-ID | CWE-327 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Botan Universal components / Libraries / Libraries used by multiple products |
| Vendor | Randombit |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Use of a broken or risky cryptographic algorithm
EUVDB-ID: #VU66482
Risk: Low
CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-40529
CWE-ID:
CWE-327 - Use of a Broken or Risky Cryptographic Algorithm
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to incorrect ElGamal implementation in Botan, which allows plaintext recovery. A remote attacker can perform a cross-configuration attack against OpenPGP and recover encrypted data.
Install updates from vendor's website.
Vulnerable software versionsBotan: 2.0.0 - 2.18.1
External linkshttp://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1
http://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2
http://github.com/randombit/botan/pull/2790
http://eprint.iacr.org/2021/923
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UPHGYWNJQKWLTUWBNSFB4F66MQDIL3IB/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/72NB4OLD3VHJC3YF3PEP2HKF6BYURPAO/
http://security.gentoo.org/glsa/202208-14
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
