Improper Certificate Validation in geary (Alpine package)

1) Improper Certificate Validation

EUVDB-ID: #VU46730

Risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-24661

CWE-ID: CWE-295 - Improper Certificate Validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

GNOME Geary before 3.36.3 mishandles pinned TLS certificate verification for IMAP and SMTP services using invalid TLS certificates (e.g., self-signed certificates) when the client system is not configured to use a system-provided PKCS#11 store. This allows a meddler in the middle to present a different invalid certificate to intercept incoming and outgoing mail.

Mitigation

Install update from vendor's website.

Vulnerable software versions

geary (Alpine package): 3.36.2-r0 - 3.38.0-r0

libproxy (Alpine package): 0.4.13-r0 - 0.4.15-r7

CPE2.3

• cpe:2.3:o:alpine:geary_alpine_package:3.38.0-r0:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:geary_alpine_package:3.37.92-r0:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:geary_alpine_package:3.37.91-r0:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:libproxy_alpine_package:0.4.15-r7:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:libproxy_alpine_package:0.4.15-r1:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:libproxy_alpine_package:0.4.15-r0:*:*:*:*:alpine_linux:*:

External links

http://git.alpinelinux.org/aports/commit/?id=85b502bba4b430719a5ed11864216c817cacdcba

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.