SB2017082701 - Denial of service in QPDF
Published: August 27, 2017
Security Bulletin ID
SB2017082701
Severity
Low
Patch available
YES
Number of vulnerabilities
5
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) Infinite loop (CVE-ID: CVE-2017-18183)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists in the QPDFWriter::enqueueObject() function in libqpdf/QPDFWriter.cc due to infinite loop. A remote attacker can cause the service to crash.
2) Stack-based out-of-bounds read (CVE-ID: CVE-2017-18184)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists in the function iterate_rc4 in QPDF_encryption.cc due to stack-based out-of-bounds read. A remote attacker can cause the service to crash.
3) Memory corruption (CVE-ID: CVE-2017-18185)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists in the PNG filter due to integer overflow. A remote attacker can heap-based out-of-bounds read in the Pl_Buffer::write function in Pl_Buffer.cc and cause the service to crash.
4) Infinite loop (CVE-ID: CVE-2017-18186)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists in QPDF.cc due to looping xref tables. A remote attacker can cause the service to crash.
5) Resource exhaustion (CVE-ID: CVE-2017-12595)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists in QPDFObjectHandle::parseInternal in libqpdf/QPDFObjectHandle.cc due to the tokenizer is recursive for arrays and dictionaries. A remote attacker can trick the victim into opening a specially crafted PDF document with a deep data structure, trigger stack consumption and cause the service to crash.
Remediation
Install update from vendor's website.