VulnerabilityModified
CVE-2021-44273
e2guardian v5.4.x <= v5.4.3r is affected by missing SSL certificate validation in the SSL MITM engine.
HIGH 7.4EPSS 0.97%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.97%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
e2guardian v5.4.x <= v5.4.3r is affected by missing SSL certificate validation in the SSL MITM engine. In standalone mode (i.e., acting as a proxy or a transparent proxy), with SSL MITM enabled, e2guardian, if built with OpenSSL v1.1.x, did not validate hostnames in certificates of the web servers that it connected to, and thus was itself vulnerable to MITM attacks.
- CVSS 3.1
- 7.4 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 0.97% probability · 60th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-295
- Affected
- e2bn/e2guardian
- Source
- cve@mitre.org
References
- http://www.openwall.com/lists/oss-security/2021/12/23/2Mailing List, Third Party Advisory
- https://github.com/e2guardian/e2guardian/commit/eae46a7e2a57103aadca903c4a24cca94dc502a2Patch, Third Party Advisory
- https://github.com/e2guardian/e2guardian/issues/707Exploit, Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/09/msg00010.html
- http://www.openwall.com/lists/oss-security/2021/12/23/2Mailing List, Third Party Advisory
- https://github.com/e2guardian/e2guardian/commit/eae46a7e2a57103aadca903c4a24cca94dc502a2Patch, Third Party Advisory
- https://github.com/e2guardian/e2guardian/issues/707Exploit, Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/09/msg00010.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.