SB2019012108 - Security restrictions bypass in pdns-recursor (Alpine package)
Published: January 21, 2019
Security Bulletin ID
SB2019012108
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Security restrictions bypass (CVE-ID: CVE-2019-3806)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to bypass security restrictions.
The vulnerability exists due to Lua hooks are not properly applied to queries received over TCP in some specific combination of settings. A remote attacker can bypass security policies enforced using Lua.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=d863fb499f4f3c153298e54046738251d8fc1af5
- https://git.alpinelinux.org/aports/commit/?id=fbfc29c6a052ada4d472ae1f42542c49ee9c5f86
- https://git.alpinelinux.org/aports/commit/?id=b553aeeff9686aba5ada03399a14cd82d7675db3
- https://git.alpinelinux.org/aports/commit/?id=2632d6c9a7012a1a341ebb59d60353242988c20a
- https://git.alpinelinux.org/aports/commit/?id=f2ae078758a3a6a9ba1068bf9d79123f305d54f8
- https://git.alpinelinux.org/aports/commit/?id=6a3fa7f0de2ead28d97544145519442677781eb3
- https://git.alpinelinux.org/aports/commit/?id=785c236c3e5b8ea124110f2d4a39772bc09ec8e0