Out-of-bounds write in www.zeromq zeromq
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-20235 |
| CWE-ID | CWE-787 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
zeromq Other software / Other software solutions |
| Vendor | www.zeromq.org |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Out-of-bounds write
EUVDB-ID: #VU66176
Risk: High
CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-20235
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error in src/decoder_allocators.hpp. A remote attacker can send a specially crafted request to the zeromq server and trigger a buffer overflow write of arbitrary data if CURVE/ZAP authentication is not enabled.
MitigationInstall updates from vendor's website.
Vulnerable software versionszeromq: 4.2.0 - 4.3.2
External linkshttp://bugzilla.redhat.com/show_bug.cgi?id=1921983
http://github.com/zeromq/libzmq/security/advisories/GHSA-fc3w-qxf5-7hp6
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.
