SB2019031908 - Integer overflow in libssh2 (Alpine package)
Published: March 19, 2019
Security Bulletin ID
SB2019031908
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Integer overflow (CVE-ID: CVE-2019-3856)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow when parsing keyboard prompt requests. A remote attacker can trick the victim to connect to a malicious SSH server, trigger integer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=eb32016b72283ff74dce8fb3cc88dd08388e5c7d
- https://git.alpinelinux.org/aports/commit/?id=9c414d1b72c4b7778b41503b5d9d4cc448a6a5c5
- https://git.alpinelinux.org/aports/commit/?id=d60ef1f3b3cd3b40d41722b7de616227c0b83a2b
- https://git.alpinelinux.org/aports/commit/?id=eec223036af35046c74baca7b09d6a81aaccbe86
- https://git.alpinelinux.org/aports/commit/?id=0c38351d5beace23bc498ea5fc79b3ba6a012b6e
- https://git.alpinelinux.org/aports/commit/?id=27f813a2ece1924d1c8f2e02239ad214611599fb
- https://git.alpinelinux.org/aports/commit/?id=4f69ccce51fcfa18af42948e79d26c5d0ba42733