Arch Linux Security Advisory ASA-201811-17 ========================================== Severity: High Date : 2018-11-20 CVE-ID : CVE-2017-9935 CVE-2017-11613 CVE-2018-18557 CVE-2018-18661 Package : libtiff Type : multiple issues Remote : Yes Link : https://security.archlinux.org/AVG-790 Summary ======= The package libtiff before version 4.0.10-1 is vulnerable to multiple issues including arbitrary code execution and denial of service. Resolution ========== Upgrade to 4.0.10-1. # pacman -Syu "libtiff>=4.0.10-1" The problems have been fixed upstream in version 4.0.10. Workaround ========== None. Description =========== - CVE-2017-9935 (arbitrary code execution) In LibTIFF before 4.0.10, there is a heap-based buffer overflow in the t2p_write_pdf function in tools/tiff2pdf.c. This heap overflow could lead to different damages. For example, a crafted TIFF document can lead to an out-of-bounds read in TIFFCleanup, an invalid free in TIFFClose or t2p_free, memory corruption in t2p_readwrite_pdf_image, or a double free in t2p_free. Given these possibilities, it probably could cause arbitrary code execution. - CVE-2017-11613 (denial of service) In LibTIFF before 4.0.10, there is a denial of service vulnerability in the TIFFOpen function triggered by resource consumption via crafted input files. During the TIFFOpen process, td_imagelength is not checked. The value of td_imagelength can be directly controlled by an input file. In the ChopUpSingleUncompressedStrip function, the _TIFFCheckMalloc function is called based on td_imagelength. If we set the value of td_imagelength close to the amount of system memory, it will hang the system or trigger the OOM killer. - CVE-2018-18557 (arbitrary code execution) LibTIFF before 4.0.10 (with JBIG enabled) decodes arbitrarily-sized JBIG into a buffer, ignoring the buffer size, which leads to a tif_jbig.c JBIGDecode out-of-bounds write. - CVE-2018-18661 (denial of service) A null-pointer dereference has been found in LibTIFF before 4.0.10 in the LZWDecode() function in the file tif_lzw.c. Impact ====== A remote attacker might be able to cause a denial of service or execute arbitrary code on the affected host via a crafted picture file. References ========== https://bugs.archlinux.org/task/60599 http://bugzilla.maptools.org/show_bug.cgi?id=2704 https://gitlab.com/libtiff/libtiff/commit/5848777bd7e4f465681a7c4d0acf96a1db... http://bugzilla.maptools.org/show_bug.cgi?id=2724 https://gitlab.com/libtiff/libtiff/commit/3719385a3fac5cfb20b487619a5f08abbf... https://gitlab.com/libtiff/libtiff/commit/7a092f8af2568d61993a8cc2e7a35a998d... https://bugs.chromium.org/p/project-zero/issues/detail?id=1697 https://gitlab.com/libtiff/libtiff/merge_requests/38 https://gitlab.com/libtiff/libtiff/commit/681748ec2f5ce88da5f9fa6831e1653e46... http://bugzilla.maptools.org/show_bug.cgi?id=2819 https://gitlab.com/libtiff/libtiff/commit/99b10edde9a0fc28cc0e7b7757aa18ac4c... https://security.archlinux.org/CVE-2017-9935 https://security.archlinux.org/CVE-2017-11613 https://security.archlinux.org/CVE-2018-18557 https://security.archlinux.org/CVE-2018-18661