Vulnerability Details : 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."
Products affected by CVE-2020-15953
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
- cpe:2.3:a:libetpan_project:libetpan:*:*:*:*:*:*:*:*
- cpe:2.3:a:libmailcore:mailcore2:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-15953
1.33%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 86 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-15953
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:N |
8.6
|
4.9
|
NIST | |
|
7.4
|
HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
2.2
|
5.2
|
NIST |
CWE ids for CVE-2020-15953
-
The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-15953
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QFBWNA5REI5ZGW2DAOEAVHM23MOU6O5J/
[SECURITY] Fedora 32 Update: libetpan-1.9.4-4.fc32 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://lists.debian.org/debian-lts-announce/2020/08/msg00026.html
[SECURITY] [DLA 2329-1] libetpan security updateMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M65FVH5XPS23NLHFN3ABEGBSCHZAISXN/
[SECURITY] Fedora 31 Update: libetpan-1.9.3-3.fc31 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00060.html
[security-announce] openSUSE-SU-2020:1454-1: moderate: Security update fBroken Link
-
https://security.gentoo.org/glsa/202007-55
libetpan: Improper STARTTLS handling (GLSA 202007-55) — Gentoo securityThird Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00075.html
[security-announce] openSUSE-SU-2020:1505-1: moderate: Security update fBroken Link
-
https://github.com/dinhvh/libetpan/issues/386
Buffering issues with STARTTLS in IMAP · Issue #386 · dinhvh/libetpan · GitHubExploit;Patch;Third Party Advisory
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