CVE-2021-41043 Use after free in tcpslice
A use-after-free vulnerability in tcpslice can cause a crash, primarily affecting network analysts and developers using this tool.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-41043?
CVE-2021-41043 is a medium-severity use after free vulnerability in The Tcpdump Group tcpslice, published on 5 Jan 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Use after free in tcpslice triggers AddressSanitizer, no other confirmed impact.
Weakness: CWE-416
Which versions are affected by CVE-2021-41043?
It affects 1 product.
Linux distribution packages (19)
tcpdump AlmaLinux:8 | All versions | 14:4.9.3-3.el8_9.1.alma.1 |
tcpdump AlmaLinux:9 | All versions | 14:4.99.0-9.el9 |
tcpdump Red Hat:enterprise_linux:8::appstream | All versions | 14:4.9.3-3.el8_9.1 |
tcpdump-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 14:4.9.3-3.el8_9.1 |
tcpdump-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 14:4.9.3-3.el8_9.1 |
tcpdump Red Hat:enterprise_linux:9::appstream | All versions | 14:4.99.0-9.el9 |
tcpdump-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 14:4.99.0-9.el9 |
tcpdump-debugsource Red Hat:enterprise_linux:9::appstream | All versions | 14:4.99.0-9.el9 |
tcpdump Red Hat:rhel_eus:8.6::appstream | All versions | 14:4.9.3-3.el8_6.1 |
tcpdump-debuginfo Red Hat:rhel_eus:8.6::appstream | All versions | 14:4.9.3-3.el8_6.1 |
tcpdump-debugsource Red Hat:rhel_eus:8.6::appstream | All versions | 14:4.9.3-3.el8_6.1 |
tcpdump Red Hat:rhel_eus:8.8::appstream | All versions | 14:4.9.3-3.el8_8.1 |
tcpdump-debuginfo Red Hat:rhel_eus:8.8::appstream | All versions | 14:4.9.3-3.el8_8.1 |
tcpdump-debugsource Red Hat:rhel_eus:8.8::appstream | All versions | 14:4.9.3-3.el8_8.1 |
tcpdump Red Hat:rhel_eus:9.2::appstream | All versions | 14:4.99.0-6.el9_2.1 |
tcpdump-debuginfo Red Hat:rhel_eus:9.2::appstream | All versions | 14:4.99.0-6.el9_2.1 |
tcpdump-debugsource Red Hat:rhel_eus:9.2::appstream | All versions | 14:4.99.0-6.el9_2.1 |
tcpdump Rocky Linux:8 | All versions | 4:4.9.3-3.el8_9.1 |
tcpdump Rocky Linux:9 | All versions | 4:4.99.0-9.el9 |
Products include Tcpdump Tcpslice.
How do I fix CVE-2021-41043?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2021-41043 being exploited?
There is no known exploitation of CVE-2021-41043 in the wild and no public exploit code.
Sources
Also known as ALSA-2024:0769, ALSA-2024:2211, DEBIAN-CVE-2021-41043, GHSA-hgc7-hm7p-p5cj, RHSA-2024:0410, RHSA-2024:0571 and 6 more.