CVE-2021-1252
published 2021-04-08CVE-2021-1252: A vulnerability in the Excel XLM macro parsing module in Clam AntiVirus (ClamAV) Software versions 0.103.0 and 0.103.1 could allow an unauthenticated, remote…
PriorityP343high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
2.62%
83.8th percentile
A vulnerability in the Excel XLM macro parsing module in Clam AntiVirus (ClamAV) Software versions 0.103.0 and 0.103.1 could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to improper error handling that may result in an infinite loop. An attacker could exploit this vulnerability by sending a crafted Excel file to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process hang, resulting in a denial of service condition.
Affected
20 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | clamav | — | — |
| cisco | clamav | — | — |
| clamav | clamav | — | — |
| clamav | clamav | — | — |
| clamav | clamav | >= 0 < 0.103.2+dfsg-1 | 0.103.2+dfsg-1 |
| clamav | clamav | >= 0 < 0.103.2+dfsg-1 | 0.103.2+dfsg-1 |
| clamav | clamav | >= 0 < 0.103.2+dfsg-1 | 0.103.2+dfsg-1 |
| clamav | clamav | >= 0 < 0.103.2+dfsg-1 | 0.103.2+dfsg-1 |
| clamav | clamav | >= 0 < 0.103.2+dfsg-0ubuntu0.16.04.1 | 0.103.2+dfsg-0ubuntu0.16.04.1 |
| clamav | clamav | >= 0 < 0.103.2+dfsg-0ubuntu0.18.04.2 | 0.103.2+dfsg-0ubuntu0.18.04.2 |
| clamav | clamav | >= 0 < 0.103.2+dfsg-0ubuntu0.18.04.1 | 0.103.2+dfsg-0ubuntu0.18.04.1 |
| clamav | clamav | >= 0 < 0.103.2+dfsg-0ubuntu0.20.04.2 | 0.103.2+dfsg-0ubuntu0.20.04.2 |
| clamav | clamav | >= 0 < 0.103.2+dfsg-0ubuntu0.20.04.1 | 0.103.2+dfsg-0ubuntu0.20.04.1 |
| clamav | clamav | >= 0 < 0.103.2+dfsg-0ubuntu0.14.04.1+esm2 | 0.103.2+dfsg-0ubuntu0.14.04.1+esm2 |
| clamav | clamav | >= 0 < 0.103.2+dfsg-0ubuntu0.14.04.1+esm1 | 0.103.2+dfsg-0ubuntu0.14.04.1+esm1 |
| clamav | clamav | >= 0 < 0.103.2+dfsg-0ubuntu0.16.04.1+esm1 | 0.103.2+dfsg-0ubuntu0.16.04.1+esm1 |
| debian | clamav | < clamav 0.103.2+dfsg-1 (bookworm) | clamav 0.103.2+dfsg-1 (bookworm) |
| msrc | cbl_mariner_1.0_arm | — | — |
| msrc | cbl_mariner_1.0_x64 | — | — |
| msrc | cm1_clamav_0.103.2-1_on_cbl_mariner_1.0 | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.07.8HIGHAV:N/AC:L/Au:N/C:N/I:N/A:C
osv7.5HIGH
vendor_debian7.5HIGH
vendor_msrc7.5HIGH
vendor_ubuntu7.5HIGH
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GHSA
GHSA-5qm5-4fjv-ghcw: A vulnerability in the Excel XLM macro parsing module in Clam AntiVirus (ClamAV) Software versions 0
ghsa_unreviewed·2022-05-24
CVE-2021-1252 [HIGH] CWE-20 GHSA-5qm5-4fjv-ghcw: A vulnerability in the Excel XLM macro parsing module in Clam AntiVirus (ClamAV) Software versions 0
A vulnerability in the Excel XLM macro parsing module in Clam AntiVirus (ClamAV) Software versions 0.103.0 and 0.103.1 could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to improper error handling that may result in an infinite loop. An attacker could exploit this vulnerability by sending a crafted Excel file to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process hang, resulting in a denial of service condition.
OSV
clamav regression
osv·2021-05-03·CVSS 7.5
CVE-2021-1252 [HIGH] clamav regression
clamav regression
USN-4918-1 fixed vulnerabilities in ClamAV. The updated package could
fail to properly scan in some situations. This update fixes
the problem.
Original advisory details:
It was discovered that ClamAV incorrectly handled parsing Excel documents.
A remote attacker could possibly use this issue to cause ClamAV to hang,
resulting in a denial of service. (CVE-2021-1252)
It was discovered that ClamAV incorrectly handled parsing PDF documents. A
remote attacker could possibly use this issue to cause ClamAV to crash,
resulting in a denial of service. (CVE-2021-1404)
It was discovered that ClamAV incorrectly handled parsing email. A remote
attacker could possibly use this issue to cause ClamAV to crash, resulting
in a denial of service. (CVE-2021-1405)
OSV
clamav vulnerabilities
osv·2021-04-20·CVSS 7.5
CVE-2021-1252 [HIGH] clamav vulnerabilities
clamav vulnerabilities
USN-4918-1 fixed several vulnerabilities in ClamAV. This update provides
the corresponding update for Ubuntu 14.04 ESM.
Original advisory details:
It was discovered that ClamAV incorrectly handled parsing Excel documents.
A remote attacker could possibly use this issue to cause ClamAV to hang,
resulting in a denial of service. (CVE-2021-1252)
It was discovered that ClamAV incorrectly handled parsing PDF documents. A
remote attacker could possibly use this issue to cause ClamAV to crash,
resulting in a denial of service. (CVE-2021-1404)
It was discovered that ClamAV incorrectly handled parsing email. A remote
attacker could possibly use this issue to cause ClamAV to crash, resulting
in a denial of service. (CVE-2021-1405)
OSV
clamav vulnerabilities
osv·2021-04-19·CVSS 7.5
CVE-2021-1252 [HIGH] clamav vulnerabilities
clamav vulnerabilities
It was discovered that ClamAV incorrectly handled parsing Excel documents.
A remote attacker could possibly use this issue to cause ClamAV to hang,
resulting in a denial of service. (CVE-2021-1252)
It was discovered that ClamAV incorrectly handled parsing PDF documents. A
remote attacker could possibly use this issue to cause ClamAV to crash,
resulting in a denial of service. (CVE-2021-1404)
It was discovered that ClamAV incorrectly handled parsing email. A remote
attacker could possibly use this issue to cause ClamAV to crash, resulting
in a denial of service. (CVE-2021-1405)
OSV
CVE-2021-1252: A vulnerability in the Excel XLM macro parsing module in Clam AntiVirus (ClamAV) Software versions 0
osv·2021-04-08·CVSS 7.5
CVE-2021-1252 [HIGH] CVE-2021-1252: A vulnerability in the Excel XLM macro parsing module in Clam AntiVirus (ClamAV) Software versions 0
A vulnerability in the Excel XLM macro parsing module in Clam AntiVirus (ClamAV) Software versions 0.103.0 and 0.103.1 could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to improper error handling that may result in an infinite loop. An attacker could exploit this vulnerability by sending a crafted Excel file to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process hang, resulting in a denial of service condition.
Ubuntu
ClamAV regression
vendor_ubuntu·2021-05-03·CVSS 7.5
CVE-2021-1252 [HIGH] ClamAV regression
Title: ClamAV regression
Summary: USN-4918-1 introduced a regression in ClamAV that could cause it to fail to scan.
USN-4918-1 fixed vulnerabilities in ClamAV. The updated package could
fail to properly scan in some situations. This update fixes
the problem.
Original advisory details:
It was discovered that ClamAV incorrectly handled parsing Excel documents.
A remote attacker could possibly use this issue to cause ClamAV to hang,
resulting in a denial of service. (CVE-2021-1252)
It was discovered that ClamAV incorrectly handled parsing PDF documents. A
remote attacker could possibly use this issue to cause ClamAV to crash,
resulting in a denial of service. (CVE-2021-1404)
It was discovered that ClamAV incorrectly handled parsing email. A remote
attacker could possibly use this issue
Ubuntu
ClamAV vulnerabilities
vendor_ubuntu·2021-04-20·CVSS 7.5
CVE-2021-1252 [HIGH] ClamAV vulnerabilities
Title: ClamAV vulnerabilities
Summary: Several security issues were fixed in ClamAV.
USN-4918-1 fixed several vulnerabilities in ClamAV. This update provides
the corresponding update for Ubuntu 14.04 ESM.
Original advisory details:
It was discovered that ClamAV incorrectly handled parsing Excel documents.
A remote attacker could possibly use this issue to cause ClamAV to hang,
resulting in a denial of service. (CVE-2021-1252)
It was discovered that ClamAV incorrectly handled parsing PDF documents. A
remote attacker could possibly use this issue to cause ClamAV to crash,
resulting in a denial of service. (CVE-2021-1404)
It was discovered that ClamAV incorrectly handled parsing email. A remote
attacker could possibly use this issue to cause ClamAV to crash, resulting
in a denial of serv
Ubuntu
ClamAV vulnerabilities
vendor_ubuntu·2021-04-19·CVSS 7.5
CVE-2021-1405 [HIGH] ClamAV vulnerabilities
Title: ClamAV vulnerabilities
Summary: Several security issues were fixed in ClamAV.
It was discovered that ClamAV incorrectly handled parsing Excel documents.
A remote attacker could possibly use this issue to cause ClamAV to hang,
resulting in a denial of service. (CVE-2021-1252)
It was discovered that ClamAV incorrectly handled parsing PDF documents. A
remote attacker could possibly use this issue to cause ClamAV to crash,
resulting in a denial of service. (CVE-2021-1404)
It was discovered that ClamAV incorrectly handled parsing email. A remote
attacker could possibly use this issue to cause ClamAV to crash, resulting
in a denial of service. (CVE-2021-1405)
Instructions: This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system upda
Microsoft
Clam AntiVirus (ClamAV) Excel XLM Parser Denial of Service Vulnerability
vendor_msrc·2021-04-13·CVSS 7.5
CVE-2021-1252 [HIGH] CWE-835 Clam AntiVirus (ClamAV) Excel XLM Parser Denial of Service Vulnerability
Clam AntiVirus (ClamAV) Excel XLM Parser Denial of Service Vulnerability
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
cisco: cisco
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Referen
Debian
CVE-2021-1252: clamav - A vulnerability in the Excel XLM macro parsing module in Clam AntiVirus (ClamAV)...
vendor_debian·2021·CVSS 7.5
CVE-2021-1252 [HIGH] CVE-2021-1252: clamav - A vulnerability in the Excel XLM macro parsing module in Clam AntiVirus (ClamAV)...
A vulnerability in the Excel XLM macro parsing module in Clam AntiVirus (ClamAV) Software versions 0.103.0 and 0.103.1 could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to improper error handling that may result in an infinite loop. An attacker could exploit this vulnerability by sending a crafted Excel file to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process hang, resulting in a denial of service condition.
Scope: local
bookworm: resolved (fixed in 0.103.2+dfsg-1)
bullseye: resolved (fixed in 0.103.2+dfsg-1)
forky: resolved (fixed in 0.103.2+dfsg-1)
sid: resolved (fixed in 0.103.2+dfsg-1)
trixie: resolved (fixed in 0.103.2+dfsg-1)
No detection rules found.
No public exploits indexed.
Talos
Vulnerability Spotlight: Information disclosure, privilege escalation vulnerabilities in IOBit Advanced SystemCare Ultimate
blogs_talos·2021-07-07·CVSS 5.5
[MEDIUM] Vulnerability Spotlight: Information disclosure, privilege escalation vulnerabilities in IOBit Advanced SystemCare Ultimate
## Vulnerability Spotlight: Information disclosure, privilege escalation vulnerabilities in IOBit Advanced SystemCare Ultimate
Cory Duplantis of Cisco Talos discovered this vulnerability. Blog by Jon Munshaw.
Cisco Talos recently discovered multiple vulnerabilities in IOBit Advanced SystemCare Ultimate.
IOBit Advanced SystemCare Ultimate is a system optimizer that promises to remove unwanted files and application from PCs to improve performance. The software allows users to view services running on their computer, processes that are using a large amount of memory and updates for other software. These vulnerabilities all exist in a monitoring driver in the software.
TALOS-2021-1255 (CVE-2021-21790 - CVE-2021-21792) and TALOS-2021-1252 (CVE-2021-21785) are information disclosure vulnerab
Talos
Vulnerability Spotlight: Information disclosure, privilege escalation vulnerabilities in IOBit Advanced SystemCare Ultimate
blogs_talos·2021-07-07·CVSS 5.5
[MEDIUM] Vulnerability Spotlight: Information disclosure, privilege escalation vulnerabilities in IOBit Advanced SystemCare Ultimate
Cory Duplantis of Cisco Talos discovered this vulnerability. Blog by Jon Munshaw.
Cisco Talos recently discovered multiple vulnerabilities in IOBit Advanced SystemCare Ultimate.
IOBit Advanced SystemCare Ultimate is a system optimizer that promises to remove unwanted files and application from PCs to improve performance. The software allows users to view services running on their computer, processes that are using a large amount of memory and updates for other software. These vulnerabilities all exist in a monitoring driver in the software.
TALOS-2021-1255 (CVE-2021-21790 - CVE-2021-21792) and TALOS-2021-1252 (CVE-2021-21785) are information disclosure vulnerabilities that an attacker could trigger by tricking the user into opening a specially crafted I/O request packet (IRP).
An attac
2021-04-08
Published