Out-of-bounds Read in Clamav

CVE-2018-0202

clamscan in ClamAV before 0.99.4 contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper input validation checking mechanisms when handling Portable Document Format (.pdf) files sent to an affected device. An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted .pdf file to an affected device. This action could cause an out-of-bounds read when ClamAV scans the malicious file, allowing the attacker to cause a DoS condition. This concerns pdf_parse_array and pdf_parse_string in libclamav/pdfng.c. Cisco Bug IDs: CSCvh91380, CSCvh91400.

Vulnerability class: Buffer Overflow

EPSS: 0.027 (84.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

  • psirt@cisco.com (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
  • psirt@cisco.com (x_refsource_CONFIRM, Patch, Third Party Advisory, Issue Tracking)
  • psirt@cisco.com (x_refsource_CONFIRM, Third Party Advisory, Issue Tracking)
  • psirt@cisco.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
  • psirt@cisco.com (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
  • psirt@cisco.com (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)

Frequently asked questions

What is CVE-2018-0202?
CVE-2018-0202 is a medium-severity vulnerability in Clamav, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2018-03-27.
How severe is CVE-2018-0202?
Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2018-0202 known to be exploited?
7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.