SB2018101126 - Ubuntu update for texlive-bin
Published: October 11, 2018 Updated: October 30, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Link following (CVE-ID: CVE-2015-5700)
CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')
CVSSv4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local authenticated user to read and manipulate data.
mktexlsr revision 22855 through revision 36625 as packaged in texlive allows local users to write to arbitrary files via a symlink attack.
2) Buffer overflow (CVE-ID: CVE-2018-17407)
CWE-ID: CWE-120 - Buffer overflow
CVSSv4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to buffer overflow when handling of Type 1 fonts by the t1_check_unusual_charstring functions, as defined in the writet1.c source code file. A remote unauthenticated attacker can trick the victim into loading a file that submits malicious Type 1 fonts to the targeted system with the pdflatex, pdftex, dvips, or luatex tools, trigger memory corruption and execute arbitrary code with elevated privileges.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.