SB2019111328 - Arch Linux update for libtiff

Description

This security bulletin contains information about 2 vulnerabilities.

1) Memory leak (CVE-ID: CVE-2019-6128)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak in TIFFFdOpen function in tif_unix.c. A remote attacker can trigger memory leak and perform denial of service attack.

2) NULL pointer dereference (CVE-ID: CVE-2019-7663)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to an invalid address dereference condition that exists in the TIFFWriteDirectoryTagTransferfunction, as defined in the libtiff/tif_dirwrite.c source code file. A remote attacker can trick the victim into accessing a Tagged Image File Format (TIFF) file that submits malicious input and trigger a segmentation fault in the cpSeparateBufToContigBuf function in the tiffcp.c file, resulting in a DoS condition.

Remediation

Install update from vendor's website.

References

• https://security.archlinux.org/advisory/ASA-201911-13