Vulnerability 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."
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Libetpan Project | Libetpan | <= 1.9.4 |
| Libmailcore | Mailcore2 | <= 0.6.3 |
| Fedoraproject | Fedora | 31 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00060.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00075.htmlBroken Link
- https://github.com/dinhvh/libetpan/issues/386ExploitPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/08/msg00026.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202007-55Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00060.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00075.htmlBroken Link
- https://github.com/dinhvh/libetpan/issues/386ExploitPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/08/msg00026.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202007-55Third Party Advisory
FAQ
What is CVE-2020-15953?
CVE-2020-15953 is a vulnerability with a CVSS score of 7.4 (HIGH). 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...
How severe is CVE-2020-15953?
CVE-2020-15953 has been rated HIGH with a CVSS base score of 7.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-15953?
Check the references section above for vendor advisories and patch information. Affected products include: Libetpan Project Libetpan, Libmailcore Mailcore2, Fedoraproject Fedora, Debian Debian Linux.