SB2019012109 - Security restrictions bypass in pdns-recursor (Alpine package)
Published: January 21, 2019
Security Bulletin ID
SB2019012109
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-2019-3807)
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 records in the answer section of responses received from authoritative servers with the AA flag not set were not properly validated. A remote attacker can bypass DNSSEC validation.
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=4f995056d1cc52e27ae67abc42e4a53789c45fe2
- https://git.alpinelinux.org/aports/commit/?id=6a3fa7f0de2ead28d97544145519442677781eb3
- https://git.alpinelinux.org/aports/commit/?id=785c236c3e5b8ea124110f2d4a39772bc09ec8e0