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ubuntuUbuntuUSN-4598-1
HistoryOct 22, 2020 - 12:00 a.m.

LibEtPan vulnerability

2020-10-2200:00:00
ubuntu.com
57
libetpan
starttls
vulnerability
ubuntu 16.04
esm
imap
smtp
pop3
response injection
cve-2020-15953
unix

CVSS2

5.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:P/A:N

CVSS3

7.4

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

AI Score

7.7

Confidence

High

EPSS

0.013

Percentile

86.1%

Releases

  • Ubuntu 16.04 ESM

Packages

  • libetpan - Mail Framework for C Language

Details

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)

CVSS2

5.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:P/A:N

CVSS3

7.4

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

AI Score

7.7

Confidence

High

EPSS

0.013

Percentile

86.1%