SB2019102432 - Buffer overflow in unbound (Alpine package)
Published: October 24, 2019
Security Bulletin ID
SB2019102432
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) Buffer overflow (CVE-ID: CVE-2019-16866)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack
The vulnerability exists due to a boundary error when processing NOTIFY queries in Unbound. A remote attacker can send a specially crafted NOTIFY query, trigger uninitialized memory access and crash the service.
Successful exploitation of this vulnerability requires that the source IP address of the query matches an access-control rule.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=0525728247e68c3ea0700787e56ad61836eb3069
- https://git.alpinelinux.org/aports/commit/?id=c15ac7b24c62c2eb5c854f9ba3a7de436c8c553e
- https://git.alpinelinux.org/aports/commit/?id=5448ec9e510aed4692e6fb133beed694a0c6b66c
- https://git.alpinelinux.org/aports/commit/?id=4dbf057fbe38b3e87d05eb61a918e5154233722a
- https://git.alpinelinux.org/aports/commit/?id=93574d3c2153b4857d6ac2aed244d773654aca30
- https://git.alpinelinux.org/aports/commit/?id=10154706bf344955d0bcd1e5ecb1ef7a7aeec2e5
- https://git.alpinelinux.org/aports/commit/?id=73eb35a4678f12c11a7a0cae308c1acbd4a04e17
- https://git.alpinelinux.org/aports/commit/?id=ac13a7ec13c38e284179ba8bd155ea75a6bb62ea