PT-2019-15699 · Tnef+2 · Tnef+2

Paul Dreik · Published 2019-11-11 · Updated 2024-08-06 · CVE-2019-18849

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions tnef versions prior to 1.4.18

Description The issue allows an attacker to potentially write to the victim's .ssh/authorized keys file via a crafted winmail.dat application/ms-tnef attachment in an email message. This is due to a heap-based buffer over-read involving the strdup function.

Recommendations For versions prior to 1.4.18, update to version 1.4.18 or later to resolve the issue. As a temporary workaround, consider restricting the handling of winmail.dat attachments to minimize the risk of exploitation.

Exploit

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

ALT-PU-2019-3194

ALT-PU-2024-10571

CVE-2019-18849

DLA-2005-1

DLA-2748-1

MGASA-2019-0367

ROSA-SA-2023-2173

USN-4524-1

Affected Products

Alt Linux

Ubuntu

Tnef

References · 23

• 🔥 https://github.com/verdammelt/tnef/pull/40 · Exploit
• https://github.com/verdammelt/tnef/compare/1.4.17...1.4.18 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-18849 · Vendor Advisory
• https://usn.ubuntu.com/4524-1 · Vendor Advisory
• https://osv.dev/vulnerability/USN-4524-1 · Vendor Advisory
• https://debian.org/lts/security/2019/dla-2005 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-18849 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-18849 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-4524-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2019-18849 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2019-0367 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W7CPKBW4QZ4VIY4UXIUVUSHRJ4R2FROE · Vendor Advisory
• https://advisories.mageia.org/MGASA-2019-0367.html · Security Note
• https://osv.dev/vulnerability/CVE-2019-18849 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-18849 · Security Note