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CVE Vulnerabilities

CVE-2020-1983

Use After Free

Published: Apr 22, 2020 | Modified: Nov 21, 2024
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
CVSS 2.x
2.1 LOW
AV:L/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
6.5 MODERATE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2020-1983
CWEhttps://cwe.mitre.org/data/definitions/416.html

A use after free vulnerability in ip_reass() in ip_input.c of libslirp 4.2.0 and prior releases allows crafted packets to cause a denial of service.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

NameVendorStart VersionEnd Version
LibslirpLibslirp_project*4.2.0 (including)
Advanced Virtualization for RHEL 8.1.1RedHatvirt:8.1-8010120200911011910.5db1954d*
Advanced Virtualization for RHEL 8.1.1RedHatvirt-devel:8.1-8010120200911011910.5db1954d*
Advanced Virtualization for RHEL 8.2.1RedHatvirt:8.2-8020120200707202843.11e3e113*
Advanced Virtualization for RHEL 8.2.1RedHatvirt-devel:8.2-8020120200707202843.11e3e113*
Red Hat Enterprise Linux 7RedHatqemu-kvm-10:1.5.3-175.el7_9.1*
Red Hat Enterprise Linux 7RedHatqemu-kvm-ma-10:2.12.0-48.el7_9.2*
Red Hat Enterprise Linux 8RedHatcontainer-tools:rhel8-8020120200601155013.ffd2803a*
Red Hat Enterprise Linux 8RedHatvirt-devel:rhel-8030020200909014558.30b713e6*
Red Hat Enterprise Linux 8RedHatvirt:rhel-8030020200909014558.30b713e6*
Red Hat OpenStack Platform 13.0 (Queens)RedHatqemu-kvm-rhev-10:2.12.0-48.el7_9.2*
Red Hat Virtualization 4 for Red Hat Enterprise Linux 7RedHatqemu-kvm-rhev-10:2.12.0-48.el7_9.2*
Red Hat Virtualization Engine 4.3RedHatqemu-kvm-rhev-10:2.12.0-48.el7_9.2*
LibslirpUbuntudevel*
LibslirpUbuntuesm-infra/focal*
LibslirpUbuntufocal*
LibslirpUbuntugroovy*
LibslirpUbuntuhirsute*
LibslirpUbuntuimpish*
LibslirpUbuntujammy*
LibslirpUbuntukinetic*
LibslirpUbuntulunar*
LibslirpUbuntumantic*
LibslirpUbuntunoble*
LibslirpUbuntuoracular*
LibslirpUbuntuplucky*
LibslirpUbuntuquesting*
LibslirpUbuntutrusty*
QemuUbuntubionic*
QemuUbuntueoan*
QemuUbuntuesm-infra-legacy/trusty*
QemuUbuntuesm-infra/bionic*
QemuUbuntuesm-infra/xenial*
QemuUbuntutrusty*
QemuUbuntutrusty/esm*
QemuUbuntuxenial*
Qemu-kvmUbuntuprecise/esm*
Slirp4netnsUbuntueoan*
Slirp4netnsUbuntufocal*
Slirp4netnsUbuntutrusty*

Potential Mitigations

References

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