SB2020032328 - NULL pointer dereference in gd (Alpine package)
Published: March 23, 2020
Security Bulletin ID
SB2020032328
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2018-14553)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
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 gdImageClone() function in gd.c file in libgd. A remote attacker can trigger denial of service conditions via a specific function call sequence. Only affects PHP when linked with an external libgd (not bundled).
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=2a812850377ca7dcbe311355ac0ea61aeab8b64a
- https://git.alpinelinux.org/aports/commit/?id=3deb517cec296a32e5b25f1a75a48c2026a44af4
- https://git.alpinelinux.org/aports/commit/?id=b7a6616325748291eb409fbe35ebf1a7c7070558
- https://git.alpinelinux.org/aports/commit/?id=bf12d0cce2f7c5041a183d56c53bfbc2bf890930
- https://git.alpinelinux.org/aports/commit/?id=aad758e364da9a69d0d519b619cc6eb2c7d150f8