CVE-2021-3595
First published: Thu Jun 10 2021(Updated: )
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the size of the 'tftp_t' structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Libslirp Project Libslirp | <4.6.0 | |
| Redhat Enterprise Linux | =8.0 | |
| Redhat Enterprise Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Fedoraproject Fedora | =33 | |
| Fedoraproject Fedora | =34 | |
| redhat/libslirp | <4.6.0 | 4.6.0 |
| debian/libslirp | 4.4.0-1+deb11u2 4.7.0-1 4.8.0-1 | |
| debian/qemu | 1:5.2+dfsg-11+deb11u3 1:5.2+dfsg-11+deb11u2 1:7.2+dfsg-7+deb12u7 1:9.1.1+ds-2 1:9.1.1+ds-4 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://www.cve.org/CVERecord?id=CVE-2021-3595 https://nvd.nist.gov/vuln/detail/CVE-2021-3595
- https://bugzilla.redhat.com/show_bug.cgi?id=1970489
- https://access.redhat.com/errata/RHSA-2021:4191
- https://access.redhat.com/security/cve/cve-2021-3595
- https://lists.debian.org/debian-lts-announce/2021/09/msg00000.html
- https://lists.debian.org/debian-lts-announce/2023/03/msg00013.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCKWZWY64EHTOQMLVLTSZ4AA27EWRJMH/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SGPQZFVJCFGDSISFXPCQTTBBD7QZLJKI/
- https://security.gentoo.org/glsa/202107-44
- https://security.netapp.com/advisory/ntap-20210805-0004/
- https://launchpad.net/bugs/cve/CVE-2021-3595
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GCKWZWY64EHTOQMLVLTSZ4AA27EWRJMH/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SGPQZFVJCFGDSISFXPCQTTBBD7QZLJKI/
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/93e645e7
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/3f179481
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/990163cf
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1972242
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1972243
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1972241
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/93e645e72a056ec0b2c16e0299fc5c6b94e4ca17
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/3f17948137155f025f7809fdc38576d5d2451c3d
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/990163cf3ac86b7875559f49602c4d76f46f6f30
- https://security-tracker.debian.org/tracker/CVE-2021-3595
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3595
- https://nvd.nist.gov/vuln/detail/CVE-2021-3595
- https://ubuntu.com/security/CVE-2021-3595
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2021-3595.
What is the severity of CVE-2021-3595?
CVE-2021-3595 has a severity level of 3.8 (low).
Which software is affected by CVE-2021-3595?
The affected software includes libslirp versions up to and including 4.6.0, Red Hat Enterprise Linux 8.0, Debian Debian Linux 9.0, Fedora 33 and 34.
How can I fix CVE-2021-3595?
To fix CVE-2021-3595, it is recommended to update to libslirp version 4.6.1 or newer.
Where can I find more information about CVE-2021-3595?
More information about CVE-2021-3595 can be found at the following references: [link1](https://gitlab.freedesktop.org/slirp/libslirp/-/commit/93e645e7), [link2](https://gitlab.freedesktop.org/slirp/libslirp/-/commit/3f179481), [link3](https://gitlab.freedesktop.org/slirp/libslirp/-/commit/990163cf).
- collector/redhat-cve
- collector/nvd-index
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2021-3595
- agent/severity
- agent/weakness
- agent/description
- agent/references
- agent/remedy
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/tags
- agent/event
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/usn-cve
- source/Ubuntu
- vendor/libslirp project
- canonical/libslirp project libslirp
- vendor/redhat
- canonical/redhat enterprise linux
- version/redhat enterprise linux/8.0
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/33
- version/fedoraproject fedora/34
- package-manager/redhat
- package-manager/debian