Out-of-Bounds Write in LibTIFF Due to JBIG Handling
CVE-2018-18557

8.8HIGH

Key Information:

Vendor

Libtiff

Status
Libtiff
Vendor
CVE Published:
22 October 2018

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 14%

What is CVE-2018-18557?

LibTIFF versions prior to the latest updates are vulnerable to an out-of-bounds write condition when handling JBIG images. This occurs due to the decoding process not properly respecting the size of the output buffer, which can lead to memory corruption. Attackers can exploit this vulnerability to execute arbitrary code, allowing for potential system compromise. Users are urged to update their LibTIFF installations to mitigate the risks associated with this flaw.

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2018-18557 - Proof of Concept

References

https://usn.ubuntu.com/3864-1/
vendor-advisoryx_refsource_UBUNTU
https://www.debian.org/security/2018/dsa-4349
vendor-advisoryx_refsource_DEBIAN
https://www.exploit-db.com/exploits/45694/
exploitx_refsource_EXPLOIT-DB

EPSS Score

14% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.