SB2018082032 - Input validation error in unzip (Alpine package)
Published: August 20, 2018
Security Bulletin ID
SB2018082032
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2016-9844)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input in the zi_short() function in zipinfo.c when processing a large compression method value in the central directory file header. A remote attacker can pass a specially crafted array to the application and trigger denial of service (DoS) condition.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=2d5ea9b0ef18df74869bf77e2b9b7beda9a8cfe8
- https://git.alpinelinux.org/aports/commit/?id=55374a75a54b07b8c1d75d154dfc2524813d6f09
- https://git.alpinelinux.org/aports/commit/?id=8c7e0d5c8061d459c8b2b33b122206ec6fa59163
- https://git.alpinelinux.org/aports/commit/?id=1a9d4e34862869cd3a82d1ce5c75be04b144229a
- https://git.alpinelinux.org/aports/commit/?id=6ece7a7a8aae5e1063c1441b28969ffba2fb3228
- https://git.alpinelinux.org/aports/commit/?id=72e1f06331bda12d25432e1c3c502a08c3e7529f
- https://git.alpinelinux.org/aports/commit/?id=b8ea797bc3374e3cd762e284d9e600ff4935b864
- https://git.alpinelinux.org/aports/commit/?id=c15201030ffd0c922075b586e73f318ca8d6857c