CVE-2020-7039
MEDIUMCVSS 5.6/10EPSS 3.57%
Last modified
CVE-2020-7039 is a medium-severity vulnerability rated 5.6/10 on the CVSS scale. tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which can lead to a DoS or potential execute arbitrary code.. EPSS estimates a 3.57% chance of exploitation in the next 30 days.
Description
tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which can lead to a DoS or potential execute arbitrary code.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Libslirp Project | Libslirp | 4.1.0 |
| Qemu | Qemu | 4.2.0 |
| Debian | Debian Linux | 8.0 |
| Debian | Debian Linux | 9.0 |
| Opensuse | Leap | 15.1 |
References
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00007.htmlThird Party Advisory
- http://www.openwall.com/lists/oss-security/2020/01/16/2Mailing List, Patch, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0348Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0775Third Party Advisory
- https://gitlab.freedesktop.org/slirp/libslirp/commit/2655fffed7a9e765bcb4701dd876e9dab975f289Patch, Third Party Advisory
- https://gitlab.freedesktop.org/slirp/libslirp/commit/82ebe9c370a0e2970fb5695aa19aa5214a6a1c80Patch, Third Party Advisory
- https://gitlab.freedesktop.org/slirp/libslirp/commit/ce131029d6d4a405cb7d3ac6716d03e58fb4a5d9Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/01/msg00022.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/01/msg00036.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00012.htmlMailing List, Third Party Advisory
- https://seclists.org/bugtraq/2020/Feb/0Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202005-02Third Party Advisory
- https://usn.ubuntu.com/4283-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4616Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00007.htmlThird Party Advisory
- http://www.openwall.com/lists/oss-security/2020/01/16/2Mailing List, Patch, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0348Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0775Third Party Advisory
- https://gitlab.freedesktop.org/slirp/libslirp/commit/2655fffed7a9e765bcb4701dd876e9dab975f289Patch, Third Party Advisory
- https://gitlab.freedesktop.org/slirp/libslirp/commit/82ebe9c370a0e2970fb5695aa19aa5214a6a1c80Patch, Third Party Advisory
- https://gitlab.freedesktop.org/slirp/libslirp/commit/ce131029d6d4a405cb7d3ac6716d03e58fb4a5d9Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/01/msg00022.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/01/msg00036.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00012.htmlMailing List, Third Party Advisory
- https://seclists.org/bugtraq/2020/Feb/0Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202005-02Third Party Advisory
- https://usn.ubuntu.com/4283-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4616Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-7039?
tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which can lead to a DoS or potential execute arbitrary code.
How severe is CVE-2020-7039?
CVE-2020-7039 has a CVSS score of 5.6/10 (MEDIUM severity). The EPSS model estimates a 3.57% probability of exploitation in the next 30 days.
How do I fix CVE-2020-7039?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2020-7039?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST