Medium severity · published Nov 11, 2019
CVE-2019-18849
In tnef before 1.4.18, an attacker may be able to write to the victim's .ssh/authorized_keys file via an e-mail message with a crafted winmail.dat application/ms-tnef attachment,…
5.5
CVSS
1.2%
EPSS
No
On KEV
Description
In tnef before 1.4.18, an attacker may be able to write to the victim's .ssh/authorized_keys file via an e-mail message with a crafted winmail.dat application/ms-tnef attachment, because of a heap-based buffer over-read involving strdup.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 68% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
8.0 · source: NVD
FE
Fedora · Fedoraproject
30; 31 · source: NVD
TN
Tnef · Tnef Project
before 1.4.18 · source: NVD
UL
Ubuntu Linux · Canonical
16.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-18849
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-18849
Patch
https://github.com/verdammelt/tnef/compare/1.4.17...1.4.18
Exploit
https://github.com/verdammelt/tnef/pull/40
Mailing List
https://lists.debian.org/debian-lts-announce/2019/11/msg00035.html
Mailing List
https://lists.debian.org/debian-lts-announce/2021/08/msg00025.html
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RMKFSHPMOZL7MDWU5RYOTIBTRWSZ4Z6X/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W7CPKBW4QZ4VIY4UXIUVUSHRJ4R2FROE/
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