SB2017100224 - Heap-based buffer overflow in dnsmasq (Alpine package)
Published: October 2, 2017
Security Bulletin ID
SB2017100224
Severity
High
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) Heap-based buffer overflow (CVE-ID: CVE-2017-14491)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to boundary error in dnsmasq.c file when processing DNS replies. A remote unauthenticated attacker can send specially crafted DNS packets to the affected service, trigger heap-based buffer overflow by 2 bytes and crash the service or 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=cc3d92312d674250637dad701c603e3fdfedfb4e
- https://git.alpinelinux.org/aports/commit/?id=70e17b5cf82bae935c9371277ce3d632742f5488
- https://git.alpinelinux.org/aports/commit/?id=3640e0ea2d3be8fc17d71b9faad5a0b8806d7f78
- https://git.alpinelinux.org/aports/commit/?id=3afe33ad348010beb44371a68febd5f2f252299a
- https://git.alpinelinux.org/aports/commit/?id=43dd2c9dbd748d5b095ba9eec3da18255d5bd158
- https://git.alpinelinux.org/aports/commit/?id=e2b7176ff9d902f7e8837d4a7ef0d560c903fc35