PT-2021-6522 · Libelfin+1 · Libelfin+1

Published 2021-08-04 · Updated 2021-08-10 · CVE-2020-24827

Positive Technologies (AI Summary)

CVSS v2.0

7.1

High

Base vector

AV:N/AC:M/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Libelfin version 0.3

Description A vulnerability in the dwarf::cursor::skip form function allows attackers to cause a denial of service through a segmentation fault via a crafted ELF file. The issue is related to errors in resource release. Exploitation of the vulnerability enables a remote attacker to cause a denial of service using a specially crafted ELF file.

Recommendations For Libelfin version 0.3, consider disabling the dwarf::cursor::skip form function as a temporary workaround until a patch is available. Restrict access to crafted ELF files to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Improper Resource Release

Weakness Enumeration

CWE-404

Related Identifiers

BDU:2022-01782

CVE-2020-24827

Affected Products

Debian

Libelfin

References · 11

• 🔥 https://github.com/aclements/libelfin/issues/47 · Exploit
• 🔥❌ https://github.com/xiaoxiongwang/function_bugs/tree/master/libelfin#segv-in-function-dwarfcursorskip_form-at-dwarfcursorcc181 · Exploit, Deleted
• https://cve.org/CVERecord?id=CVE-2020-24827 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2020-24827 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-01782 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-24827 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-24827 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-24827 · Security Note
• https://osv.dev/vulnerability/CVE-2020-24827 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-24827 · Vendor Advisory
• https://t.me/cibsecurity/26804 · Telegram Post