CVE-2020-21674 Memory corruption in n/a
Remote attackers can cause a denial of service via a crafted archive file in the development version of libarchive, affecting only users of the GitHub development code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-21674?
CVE-2020-21674 is a medium-severity memory corruption vulnerability in Libarchive Libarchive, published on 15 Oct 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Heap-based buffer overflow in archive_string_append_from_wcs() (archive_string.c) in libarchive-3.4.1dev allows remote attackers to cause a denial of service (out-of-bounds write in heap memory resulting into a crash) via a crafted archive file. NOTE: this only affects users who downloaded the development code from GitHub. Users of the product's official releases are unaffected.
Weakness: CWE-787
Which versions are affected by CVE-2020-21674?
It affects 1 product.
Products include Libarchive Libarchive.
How do I fix CVE-2020-21674?
No fix has been published for CVE-2020-21674 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-21674 being exploited?
There is no known exploitation of CVE-2020-21674 in the wild and no public exploit code.
Other vulnerabilities in Libarchive Libarchive
Sources
Also known as GHSA-crq5-4m3r-9jx2.