CVE-2020-21674 — Out-of-bounds Write in Libarchive

CWE-787 — Out-of-bounds WriteCWE-122 — Heap-based Buffer Overflow5 documents5 sources
Severity
6.5MEDIUMNVD
EPSS
1.7%
top 17.93%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
LibarchiveDebian Libarchive
Timeline
PublishedOct 15
Latest updateMay 24

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages2 packages

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

1
GHSA
GHSA-crq5-4m3r-9jx2: Heap-based buffer overflow in archive_string_append_from_wcs() (archive_string↗2022-05-24
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📋Vendor Advisories

2
Debian
CVE-2020-21674: libarchive - Heap-based buffer overflow in archive_string_append_from_wcs() (archive_string.c...↗2020
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Red Hat
libarchive: heap-based buffer overflow in archive_string_append_from_wcs function in archive_string.c↗2019-12-28
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💬Community

1
Bugzilla
CVE-2020-21674 libarchive: heap-based buffer overflow in archive_string_append_from_wcs function in archive_string.c↗2020-10-15
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