CVE-2020-15953

Public Exploit

Description

LibEtPan through 1.9.4, as used in MailCore 2 through 0.6.3 and other products, has a STARTTLS buffering issue that affects IMAP, SMTP, and POP3. When a server sends a "begin TLS" response, the client reads additional data (e.g., from a meddler-in-the-middle attacker) and evaluates it in a TLS context, aka "response injection."

Category

7.4
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.23% Top 25%
Vendor Advisory gentoo.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/dinhvh/libetpan/issues/386 patch third party advisory exploit
https://security.gentoo.org/glsa/202007-55 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00026.html third party advisory mailing list
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QFBWNA5REI5ZGW2DAOEAVHM23MOU6O5J/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M65FVH5XPS23NLHFN3ABEGBSCHZAISXN/ vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00060.html vendor advisory broken link
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00075.html vendor advisory broken link

Frequently Asked Questions

What is the severity of CVE-2020-15953?
CVE-2020-15953 has been scored as a high severity vulnerability.
How to fix CVE-2020-15953?
To fix CVE-2020-15953, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-15953 being actively exploited in the wild?
It is possible that CVE-2020-15953 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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