Denial of service in GNU Libtasn1
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-46848 |
| CWE-ID | CWE-193 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
libtASN1 Universal components / Libraries / Libraries used by multiple products |
| Vendor | GNU |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Off-by-one
EUVDB-ID: #VU68858
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-46848
CWE-ID:
CWE-193 - Off-by-one Error
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an ETYPE_OK off-by-one error in asn1_encode_simple_der in Libtasn1. A remote attacker can pass specially crafted data to the application, trigger an off-by-one error and perform a denial of service (DoS) attack.
Install updates from vendor's website.
Vulnerable software versionslibtASN1: 4.0 - 4.18.0
External linkshttp://gitlab.com/gnutls/libtasn1/-/issues/32
http://gitlab.com/gnutls/libtasn1/-/commit/44a700d2051a666235748970c2df047ff207aeb5
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.
