SB2020032412 - Slackware Linux update for gd
Published: March 24, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 secuirty vulnerabilities.
1) Double free error (CVE-ID: CVE-2018-1000222)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to double free memory error. A remote unauthenticated attacker can trick the victim into jpeg image, trigger memory corruption and execute arbitrary code with elevated privileges.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
2) NULL pointer dereference (CVE-ID: CVE-2018-14553)
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).
3) Infinite loop (CVE-ID: CVE-2018-5711)
The disclosed vulnerability allows a local unauthenticated attacker to cause DoS condition.
The vulnerability exists in PHP GD Graphics Library due to insufficient sanitization of user-supplied data. A local attacker can submit a specially crafted GIF, trigger an infinite loop and cause the service to crash.
4) Out-of-bounds read (CVE-ID: CVE-2019-11038)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in the gdImageCreateFromXbm() function in the GD Graphics Library (aka LibGD). A remote attacker can create a specially crafted image, pass it to the affected application, trigger out-of-bounds read error and read contents of memory on the system.
5) Out-of-bounds write (CVE-ID: CVE-2019-6977)
The vulnerability allows a remote attacker to execute arbitrary on the target system.The weakness exists due to out-of-bounds write in imagecolormatch. A remote attacker can write up to 1200 bytes over the boundaries of a buffer allocated in the imagecolormatch function, which then calls gdImageColorMatch() and execute arbitrary code with elevated privileges.
6) Double Free (CVE-ID: CVE-2019-6978)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to double free in the gdImage*Ptr() functions in gd_gif_out.c, gd_jpeg.c, and gd_wbmp.c. A remote attacker can trick the victim into opening a specially crafted input, trigger double free error and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.