CVE-2020-15953
published 2020-07-27CVE-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…
PriorityP345high7.4CVSS 3.1
AVNACHPRNUINSUCHIHAN
EPSS
2.41%
82.5th percentile
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."
Affected
11 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | libetpan | < libetpan 1.9.4-3 (bookworm) | libetpan 1.9.4-3 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| libetpan_project | libetpan | <= 1.9.4 | — |
| libetpan_project | libetpan | >= 0 < 1.9.4-3 | 1.9.4-3 |
| libetpan_project | libetpan | >= 0 < 1.9.4-3 | 1.9.4-3 |
| libetpan_project | libetpan | >= 0 < 1.9.4-3 | 1.9.4-3 |
| libetpan_project | libetpan | >= 0 < 1.9.4-3 | 1.9.4-3 |
| libetpan_project | libetpan | >= 0 < 1.6-1ubuntu0.1 | 1.6-1ubuntu0.1 |
| libmailcore | mailcore2 | <= 0.6.3 | — |
CVSS provenance
nvdv3.17.4HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
nvdv2.05.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:N
osv7.4HIGH
vendor_debian7.4HIGH
vendor_ubuntu7.4HIGH
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Ubuntu
LibEtPan vulnerability
vendor_ubuntu·2020-10-22·CVSS 7.4
CVE-2020-15953 [HIGH] LibEtPan vulnerability
Title: LibEtPan vulnerability
Summary: LibEtPan could be made to expose sensitive information over the network.
It was discovered that LibEtPan incorrectly handled STARTTLS when using
IMAP, SMTP and POP3. A remote attacker could possibly use this issue
to perform a response injection attack. (CVE-2020-15953)
Instructions: In general, a standard system update will make all the necessary changes.
Debian
CVE-2020-15953: libetpan - LibEtPan through 1.9.4, as used in MailCore 2 through 0.6.3 and other products, ...
vendor_debian·2020·CVSS 7.4
CVE-2020-15953 [HIGH] CVE-2020-15953: libetpan - LibEtPan through 1.9.4, as used in MailCore 2 through 0.6.3 and other products, ...
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."
Scope: local
bookworm: resolved (fixed in 1.9.4-3)
bullseye: resolved (fixed in 1.9.4-3)
forky: resolved (fixed in 1.9.4-3)
sid: resolved (fixed in 1.9.4-3)
trixie: resolved (fixed in 1.9.4-3)
GHSA
GHSA-f329-rp43-94r4: LibEtPan through 1
ghsa_unreviewed·2022-05-24
CVE-2020-15953 [HIGH] CWE-74 GHSA-f329-rp43-94r4: LibEtPan through 1
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."
OSV
libetpan vulnerability
osv·2020-10-22·CVSS 7.4
CVE-2020-15953 [HIGH] libetpan vulnerability
libetpan vulnerability
It was discovered that LibEtPan incorrectly handled STARTTLS when using
IMAP, SMTP and POP3. A remote attacker could possibly use this issue
to perform a response injection attack. (CVE-2020-15953)
OSV
CVE-2020-15953: LibEtPan through 1
osv·2020-07-27·CVSS 7.4
CVE-2020-15953 [HIGH] CVE-2020-15953: LibEtPan through 1
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."
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2020-15953 libetpan: response injection via STARTTLS in IMAP [epel-6]
bugzilla·2020-07-27·CVSS 7.4
CVE-2020-15953 [HIGH] CVE-2020-15953 libetpan: response injection via STARTTLS in IMAP [epel-6]
CVE-2020-15953 libetpan: response injection via STARTTLS in IMAP [epel-6]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of epel-6.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
Discussion:
Use the following template to for the 'fedpkg u
Bugzilla
CVE-2020-15953 libetpan: response injection via STARTTLS in IMAP
bugzilla·2020-07-27·CVSS 7.4
CVE-2020-15953 [HIGH] CVE-2020-15953 libetpan: response injection via STARTTLS in IMAP
CVE-2020-15953 libetpan: response injection via STARTTLS in IMAP
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."
Reference:
https://github.com/dinhvh/libetpan/issues/386
Discussion:
Created libetpan tracking bugs for this issue:
Affects: epel-6 [bug 1861072]
Affects: fedora-all [bug 1861071]
---
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual c
Bugzilla
CVE-2020-15953 libetpan: response injection via STARTTLS in IMAP [fedora-all]
bugzilla·2020-07-27·CVSS 7.4
CVE-2020-15953 [HIGH] CVE-2020-15953 libetpan: response injection via STARTTLS in IMAP [fedora-all]
CVE-2020-15953 libetpan: response injection via STARTTLS in IMAP [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported versions
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00060.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-09/msg00075.htmlhttps://github.com/dinhvh/libetpan/issues/386https://lists.debian.org/debian-lts-announce/2020/08/msg00026.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M65FVH5XPS23NLHFN3ABEGBSCHZAISXN/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QFBWNA5REI5ZGW2DAOEAVHM23MOU6O5J/https://security.gentoo.org/glsa/202007-55http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00060.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-09/msg00075.htmlhttps://github.com/dinhvh/libetpan/issues/386https://lists.debian.org/debian-lts-announce/2020/08/msg00026.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M65FVH5XPS23NLHFN3ABEGBSCHZAISXN/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QFBWNA5REI5ZGW2DAOEAVHM23MOU6O5J/https://security.gentoo.org/glsa/202007-55
2020-07-27
Published