Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | ClamAV | ClamAV | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | clamav | 0.100.0~beta+dfsg-2 | — |
| Debian 13 | clamav | 0.100.0~beta+dfsg-2 | — |
| Debian 12 | clamav | 0.100.0~beta+dfsg-2 | — |
| Debian 7 | clamav | 0.99.4+dfsg-1+deb7u1 | DLA-1307-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | clamav | 0.99.4+addedllvm-0ubuntu0.16.04.1 | USN-3592-1 |
| Ubuntu 14.04 LTS | clamav | 0.99.4+addedllvm-0ubuntu0.14.04.1 | USN-3592-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | clamav | 0.99.4-33.9.1 | SUSE-SU-2018:0809-1 |
| SLES 12 SP2 | clamav | 0.99.4-33.9.1 | SUSE-SU-2018:0809-1 |
| SLES 11 SP4 | clamav | 0.99.4-0.20.7.2 | SUSE-SU-2018:0863-1 |
| SLES 11 SP3 | clamav | 0.99.4-0.20.7.2 | SUSE-SU-2018:0863-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | clamav | 0.99.4-33.9.1 | SUSE-SU-2018:0809-1 |
| SLES for SAP 12 SP2 | clamav | 0.99.4-33.9.1 | SUSE-SU-2018:0809-1 |
| SLES for SAP 11 SP4 | clamav | 0.99.4-0.20.7.2 | SUSE-SU-2018:0863-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | clamav | 0.99.4-0.20.7.2 | SUSE-SU-2018:0863-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | clamav | 0.103.3-1.4 | openSUSE-SU-2024:10685-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | clamav | 0.99.4-r0 | — |
| Alpine v3.23 | clamav | 0.99.4-r0 | — |
| Alpine v3.22 | clamav | 0.99.4-r0 | — |
| Alpine v3.21 | clamav | 0.99.4-r0 | — |
| Alpine v3.20 | clamav | 0.99.4-r0 | — |
Show 16 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | clamav | 0.99.4-r0 | — |
| Alpine v3.18 | clamav | 0.99.4-r0 | — |
| Alpine v3.17 | clamav | 0.99.4-r0 | — |
| Alpine v3.16 | clamav | 0.99.4-r0 | — |
| Alpine v3.15 | clamav | 0.99.4-r0 | — |
| Alpine v3.14 | clamav | 0.99.4-r0 | — |
| Alpine v3.13 | clamav | 0.99.4-r0 | — |
| Alpine v3.12 | clamav | 0.99.4-r0 | — |
| Alpine v3.11 | clamav | 0.99.4-r0 | — |
| Alpine v3.10 | clamav | 0.99.4-r0 | — |
| Alpine v3.9 | clamav | 0.99.4-r0 | — |
| Alpine v3.8 | clamav | 0.99.4-r0 | — |
| Alpine v3.7 | clamav | 0.99.4-r0 | — |
| Alpine v3.6 | clamav | 0.99.4-r0 | — |
| Alpine v3.5 | clamav | 0.99.4-r0 | — |
| Alpine v3.4 | clamav | 0.99.4-r0 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 1 repository
-
automateforceai/CVE-2018-0202 ★ 1 · Nov 24, 2018
Security & Privacy in Computing(Fall 2018), Final Group Project at JHUISI, clamscan vulnerability in Cisco's ClamAV 0.99.3
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 5
- USN-3592-1 clamav vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-1307-1 clamav - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10685-1 clamav-0.103.3-1.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0863-1 Security update for clamav SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0809-1 Security update for clamav SUSE / openSUSE Security Updates · Feb 4, 2026
References
- USN-3592-2 vendor-advisory
- https://bugzilla.clamav.net/show_bug.cgi?id=11973
- https://bugzilla.clamav.net/show_bug.cgi?id=11980
- [debian-lts-announce] 20180316 [SECURITY] [DLA 1307-1] clamav security update mailing-list
- USN-3592-1 vendor-advisory
- GLSA-201804-16 vendor-advisory