SB2021020920 - NULL pointer dereference in php7 (Alpine package)
Published: February 9, 2021
Security Bulletin ID
SB2021020920
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) NULL pointer dereference (CVE-ID: CVE-2021-21702)
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 the SoapClient in PHP. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=f02a09d92f8e9b0b056cd083155c0cd2b22d3e18
- https://git.alpinelinux.org/aports/commit/?id=22c618525dfb6ca90f02cc171c9aa97b2dcf418e
- https://git.alpinelinux.org/aports/commit/?id=3fc482c6b547e3abb034df263ea4553a92283997
- https://git.alpinelinux.org/aports/commit/?id=1200b256e3e18a72b01f31915e839e1fbd9ca0d8
- https://git.alpinelinux.org/aports/commit/?id=212ff6b70afd9afdb6585306de50fb4b6e9d50d5