SB2018113014 - Out-of-bounds write in tiff (Alpine package)
Published: November 30, 2018
Security Bulletin ID
SB2018113014
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2018-18557)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to decoding of arbitrarily-sized JBIG into a buffer, ignoring the buffer size. A remote unauthenticated attacker can supply specially crafted input, trigger a tif_jbig.c JBIGDecode out-of-bounds write 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.
References
- https://git.alpinelinux.org/aports/commit/?id=264df00ff86995f0cec1bf60488ce863f57304d9
- https://git.alpinelinux.org/aports/commit/?id=928d37312121806dd7635626fa0d21b333bb4eb0
- https://git.alpinelinux.org/aports/commit/?id=0c504ed6ce49ffab8f4090a5a3ddaeeda27ecbf5
- https://git.alpinelinux.org/aports/commit/?id=42e3145e0c57d0a2e3c2717842ae6cfa41e3a03e
- https://git.alpinelinux.org/aports/commit/?id=e3af38305d3f591e839e6e77fce5cbbb19c1dc9f
- https://git.alpinelinux.org/aports/commit/?id=fc22ab4fd31b719b3fe5a77dbe226c306e94d888