PT-2021-20373 · Ytnef+1 · Ytnef+1

Jasperlao · Published 2021-03-04 · Updated 2022-09-02 · CVE-2021-3404

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: ytnef version 1.9.3

Description: The issue allows remote attackers to cause a denial-of-service and potentially execute code due to a heap buffer overflow. This can be triggered via a crafted file, specifically affecting the SwapWord function in lib/ytnef.c.

Recommendations: For ytnef version 1.9.3, consider disabling the SwapWord function in lib/ytnef.c as a temporary workaround until a patch is available. Restrict access to crafted files that could trigger the heap buffer overflow to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-119

CWE-787

Related Identifiers

ALT-PU-2021-2841

ALT-PU-2021-3287

CVE-2021-3404

MGASA-2022-0316

Affected Products

Alt Linux

Ytnef

References · 16

• 🔥 https://github.com/Yeraze/ytnef/issues/86 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-3404 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-3404 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-3404 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2022-0316.html · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-3404 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-3404 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2022-0316 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-3404 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-3404 · Security Note
• https://github.com/Yeraze/ytnef/releases · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=1926965 · Note
• https://t.me/cibsecurity/24480 · Telegram Post
• https://t.me/cvenotify/29289 · Telegram Post
• https://t.me/cvenotify/11141 · Telegram Post