What’s Vulnerable › Vulnerabilities

CVE-2020-29129

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-11-26 · updated 2026-06-17
• Weakness: CWE-125

Description

ncsi.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of header data even if that exceeds the total packet length.

Affected products

• Debian Linux: 10.0
• Fedoraproject Fedora: 32, 33
• Libslirp Project Libslirp: through 4.3.1

References

• http://www.openwall.com/lists/oss-security/2020/11/27/1
• https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/45S5IHSWYITJKMRT23HCHJQDI674AMTQ/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPCOHDEONMHH6QPJZKRLLCNRGRYODG7X/
• https://lists.freedesktop.org/archives/slirp/2020-November/000115.html
• http://www.openwall.com/lists/oss-security/2020/11/27/1
• https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/45S5IHSWYITJKMRT23HCHJQDI674AMTQ/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPCOHDEONMHH6QPJZKRLLCNRGRYODG7X/
• https://lists.freedesktop.org/archives/slirp/2020-November/000115.html

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