#VU20838 Out-of-bounds read in libarchive
Vulnerability identifier: #VU20838
Vulnerability risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-125
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
libarchive
Client/Desktop applications /
Software for archiving
Vendor: libarchive
Description
The vulnerability allows a remote attacker to perform denial of service (DoS) attack.
The vulnerability exists due to a boundary condition in the header_bytes() function in archive_read_support_format_7zip.c when decompressing 7zip archives. A remote attacker can create a specially crafted 7zip file, trick the victim into opening it, trigger out-of-bounds read error and crash the affected application.
Mitigation
Install update from vendor's website.
Vulnerable software versions
libarchive: 3.0.2 - 3.2.2
External links
http://github.com/libarchive/libarchive/pull/1120
http://github.com/libarchive/libarchive/pull/1120/commits/65a23f5dbee4497064e9bb467f81138a62b0dae1
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
