CVE-2020-29129
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.
02 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.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.46% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 73.0% of scored records. A rank, not a probability.
- NVD base score
- 4.3 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Low. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2020-11-26 19:03Z5 YR AGO
- Last updated
- 2024-08-04 16:48Z2 YR AGO
- Reserved
- 2020-11-26
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-125Out-of-bounds ReadBase
- Data version
- 5.1
- Document digest
- 17fd3b98758b4d702d26a471690e7f9c7417a1e88492628688b5efe21bd0a3f5
05 Affected products
06 References
- lists.freedesktop.orghttps://lists.freedesktop.org/archives/slirp/2020-November/000115.html
- www.openwall.com[oss-security] 20201127 CVE-2020-29129 CVE-2020-29130 QEMU: slirp: out-of-bounds access while processing ARP/NCSI packetshttp://www.openwall.com/lists/oss-security/2020/11/27/1
- lists.fedoraproject.orgFEDORA-2020-77f93f41behttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPCOHDEONMHH6QPJZKRLLCNRGRYODG7X/
- lists.fedoraproject.orgFEDORA-2020-331e1318ddhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/45S5IHSWYITJKMRT23HCHJQDI674AMTQ/
- lists.debian.org[debian-lts-announce] 20220905 [SECURITY] [DLA 3099-1] qemu security updatehttps://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
07 Fixed in
AlmaLinux 8
- hivex Fixed in 1.3.18-20.module_el8.3.0+2048+e7a0a3ea
- hivex-devel Fixed in 1.3.18-20.module_el8.3.0+2048+e7a0a3ea
- libguestfs-winsupport Fixed
A version is affected if any line below covers it.
- Affected before 8.2-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 8.2-1.module_el8.5.0+2608+72063365
- libiscsi Fixed
A version is affected if any line below covers it.
- Affected before 1.18.0-8.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.18.0-8.module_el8.5.0+2608+72063365
- Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
- libiscsi-devel Fixed
A version is affected if any line below covers it.
- Affected before 1.18.0-8.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.18.0-8.module_el8.5.0+2608+72063365
- Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
- libiscsi-utils Fixed
A version is affected if any line below covers it.
- Affected before 1.18.0-8.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.18.0-8.module_el8.5.0+2608+72063365
- Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
- libnbd Fixed
A version is affected if any line below covers it.
- Affected before 1.2.2-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.2.2-1.module_el8.5.0+2608+72063365
- libnbd-devel Fixed
A version is affected if any line below covers it.
- Affected before 1.2.2-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.2.2-1.module_el8.5.0+2608+72063365
- libvirt-dbus Fixed
A version is affected if any line below covers it.
- Affected before 1.3.0-2.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.3.0-2.module_el8.5.0+2608+72063365
- Affected before 1.3.0-2.module_el8.6.0+2880+7d9e3703
- nbdfuse Fixed
A version is affected if any line below covers it.
- Affected before 1.2.2-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.2.2-1.module_el8.5.0+2608+72063365
- nbdkit Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-bash-completion Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-basic-filters Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-basic-plugins Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-curl-plugin Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-devel Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-example-plugins Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-gzip-plugin Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-linuxdisk-plugin Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-python-plugin Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-server Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-ssh-plugin Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-vddk-plugin Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-xz-filter Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- netcf Fixed
A version is affected if any line below covers it.
- Affected before 0.2.8-12.module_el8.3.0+2048+e7a0a3ea
- Affected before 0.2.8-12.module_el8.5.0+2608+72063365
- Affected before 0.2.8-12.module_el8.6.0+2880+7d9e3703
- netcf-devel Fixed
A version is affected if any line below covers it.
- Affected before 0.2.8-12.module_el8.3.0+2048+e7a0a3ea
- Affected before 0.2.8-12.module_el8.5.0+2608+72063365
- Affected before 0.2.8-12.module_el8.6.0+2880+7d9e3703
- netcf-libs Fixed
A version is affected if any line below covers it.
- Affected before 0.2.8-12.module_el8.3.0+2048+e7a0a3ea
- Affected before 0.2.8-12.module_el8.5.0+2608+72063365
- Affected before 0.2.8-12.module_el8.6.0+2880+7d9e3703
- ocaml-hivex Fixed in 1.3.18-20.module_el8.3.0+2048+e7a0a3ea
- ocaml-hivex-devel Fixed in 1.3.18-20.module_el8.3.0+2048+e7a0a3ea
- ocaml-libguestfs Fixed in 1:1.40.2-27.module_el8.4.0+2358+630e803b.alma
- ocaml-libguestfs-devel Fixed in 1:1.40.2-27.module_el8.4.0+2358+630e803b.alma
- ocaml-libnbd Fixed in 1.2.2-1.module_el8.3.0+2048+e7a0a3ea
- ocaml-libnbd-devel Fixed in 1.2.2-1.module_el8.3.0+2048+e7a0a3ea
- perl-Sys-Virt Fixed
A version is affected if any line below covers it.
- Affected before 6.0.0-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 6.0.0-1.module_el8.5.0+2608+72063365
- perl-hivex Fixed in 1.3.18-20.module_el8.3.0+2048+e7a0a3ea
- python3-hivex Fixed in 1.3.18-20.module_el8.3.0+2048+e7a0a3ea
- python3-libnbd Fixed
A version is affected if any line below covers it.
- Affected before 1.2.2-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.2.2-1.module_el8.5.0+2608+72063365
- python3-libvirt Fixed
A version is affected if any line below covers it.
- Affected before 6.0.0-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 6.0.0-1.module_el8.5.0+2608+72063365
- ruby-hivex Fixed in 1.3.18-20.module_el8.3.0+2048+e7a0a3ea
- seabios Fixed in 1.13.0-2.module_el8.5.0+2608+72063365
6 further packages in AlmaLinux 8 not shown (first 40 listed).
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Arch Linux
- libslirp Fixed in 4.4.0-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
CloudLinux 8
- hivex Fixed in 1.3.18-20.module_el8.3.0+2048+e7a0a3ea
- hivex-devel Fixed in 1.3.18-20.module_el8.3.0+2048+e7a0a3ea
- libguestfs-winsupport Fixed
A version is affected if any line below covers it.
- Affected before 8.2-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 8.2-1.module_el8.5.0+2608+72063365
- libiscsi Fixed
A version is affected if any line below covers it.
- Affected before 1.18.0-8.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.18.0-8.module_el8.5.0+2608+72063365
- Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
- libiscsi-devel Fixed
A version is affected if any line below covers it.
- Affected before 1.18.0-8.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.18.0-8.module_el8.5.0+2608+72063365
- Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
- libiscsi-utils Fixed
A version is affected if any line below covers it.
- Affected before 1.18.0-8.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.18.0-8.module_el8.5.0+2608+72063365
- Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
- libnbd Fixed
A version is affected if any line below covers it.
- Affected before 1.2.2-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.2.2-1.module_el8.5.0+2608+72063365
- libnbd-devel Fixed
A version is affected if any line below covers it.
- Affected before 1.2.2-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.2.2-1.module_el8.5.0+2608+72063365
- libvirt-dbus Fixed
A version is affected if any line below covers it.
- Affected before 1.3.0-2.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.3.0-2.module_el8.5.0+2608+72063365
- Affected before 1.3.0-2.module_el8.6.0+2880+7d9e3703
- nbdfuse Fixed
A version is affected if any line below covers it.
- Affected before 1.2.2-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.2.2-1.module_el8.5.0+2608+72063365
- nbdkit Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-bash-completion Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-basic-filters Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-basic-plugins Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-curl-plugin Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-devel Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-example-plugins Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-gzip-plugin Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-linuxdisk-plugin Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-python-plugin Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-server Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-ssh-plugin Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-vddk-plugin Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-xz-filter Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- netcf Fixed
A version is affected if any line below covers it.
- Affected before 0.2.8-12.module_el8.3.0+2048+e7a0a3ea
- Affected before 0.2.8-12.module_el8.5.0+2608+72063365
- Affected before 0.2.8-12.module_el8.6.0+2880+7d9e3703
- netcf-devel Fixed
A version is affected if any line below covers it.
- Affected before 0.2.8-12.module_el8.3.0+2048+e7a0a3ea
- Affected before 0.2.8-12.module_el8.5.0+2608+72063365
- Affected before 0.2.8-12.module_el8.6.0+2880+7d9e3703
- netcf-libs Fixed
A version is affected if any line below covers it.
- Affected before 0.2.8-12.module_el8.3.0+2048+e7a0a3ea
- Affected before 0.2.8-12.module_el8.5.0+2608+72063365
- Affected before 0.2.8-12.module_el8.6.0+2880+7d9e3703
- ocaml-hivex Fixed in 1.3.18-20.module_el8.3.0+2048+e7a0a3ea
- ocaml-hivex-devel Fixed in 1.3.18-20.module_el8.3.0+2048+e7a0a3ea
- ocaml-libguestfs Fixed in 1:1.40.2-27.module_el8.4.0+2358+630e803b.alma
- ocaml-libguestfs-devel Fixed in 1:1.40.2-27.module_el8.4.0+2358+630e803b.alma
- ocaml-libnbd Fixed in 1.2.2-1.module_el8.3.0+2048+e7a0a3ea
- ocaml-libnbd-devel Fixed in 1.2.2-1.module_el8.3.0+2048+e7a0a3ea
- perl-Sys-Virt Fixed
A version is affected if any line below covers it.
- Affected before 6.0.0-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 6.0.0-1.module_el8.5.0+2608+72063365
- perl-hivex Fixed in 1.3.18-20.module_el8.3.0+2048+e7a0a3ea
- python3-hivex Fixed in 1.3.18-20.module_el8.3.0+2048+e7a0a3ea
- python3-libnbd Fixed
A version is affected if any line below covers it.
- Affected before 1.2.2-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.2.2-1.module_el8.5.0+2608+72063365
- python3-libvirt Fixed
A version is affected if any line below covers it.
- Affected before 6.0.0-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 6.0.0-1.module_el8.5.0+2608+72063365
- ruby-hivex Fixed in 1.3.18-20.module_el8.3.0+2048+e7a0a3ea
- seabios Fixed in 1.13.0-2.module_el8.5.0+2608+72063365
6 further packages in CloudLinux 8 not shown (first 40 listed).
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- libslirp Fixed in 4.4.0-1
- qemu Fixed in 1:4.1-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- libslirp Fixed in 4.4.0-1
- qemu Fixed in 1:4.1-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- libslirp Fixed in 4.4.0-1
- qemu Fixed in 1:4.1-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- libslirp Fixed in 4.1.0-2ubuntu2.2
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.