SB2019050506 - NULL pointer dereference in dovecot (Alpine package)
Published: May 5, 2019
Security Bulletin ID
SB2019050506
CSH 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 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2019-11494)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error within Submission-login when processing authentication. A remote attacker can unexpectedly abort the authentication process by disconnecting from the server during authentication and cause the software to crash.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=1a3664292d8641c136f1b09d244490108ffe7799
- https://git.alpinelinux.org/aports/commit/?id=4cbff22201d9f2fb21d860bae0e62f3bf814ed45
- https://git.alpinelinux.org/aports/commit/?id=7f9b5fbadaf37d0e9b4a716239593edb14d4db6b
- https://git.alpinelinux.org/aports/commit/?id=f82ad4a4bd0bcfe6c75ff43189ad29dc14c38add