Vulnerability in Libetpan Project
CVE-2020-15953
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."
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.024 (83.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 83.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000
Affected products
- Libetpan Project
- Libmailcore Mailcore2
- Debian Linux — versions 9.0
- Fedoraproject Fedora — versions 31, 32
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/dinhvh/libetpan/issues/386 (Exploit, Patch, Third Party Advisory)
- security.gentoo.org/glsa/202007-55 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/08/msg00026.html (mailing-list, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2020-09/msg00060.html (vendor-advisory, Broken Link)
- lists.opensuse.org/opensuse-security-announce/2020-09/msg00075.html (vendor-advisory, Broken Link)
Frequently asked questions
- What is CVE-2020-15953?
- CVE-2020-15953 is a high-severity vulnerability in Libetpan Project, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.4/10. Published 2020-07-27.
- How severe is CVE-2020-15953?
- High severity. CVSS v3 base score is 7.4 out of 10.
- Is CVE-2020-15953 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.