CVE-2020-13580
published 2021-02-04CVE-2020-13580: An exploitable heap-based buffer overflow vulnerability exists in the PlanMaker document parsing functionality of SoftMaker Office 2021’s PlanMaker…
PriorityP357high7.8CVSS 3.1
AVLACLPRNUIRSUCHIHAH
EPSS
72.56%
99.4th percentile
An exploitable heap-based buffer overflow vulnerability exists in the PlanMaker document parsing functionality of SoftMaker Office 2021’s PlanMaker application. A specially crafted document can cause the document parser to explicitly trust a length from a particular record type and use it to write a 16-bit null relative to a buffer allocated on the stack. Due to a lack of bounds-checking on this value, this can allow an attacker to write to memory outside of the buffer and controllably corrupt memory. This can allow an attacker to earn code execution under the context of the application. An attacker can entice the victim to open a document to trigger this vulnerability.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| softmaker | planmaker_2021 | — | — |
Detection & IOCsextracted from sources · hover to see the quote
snort↗
56209, 55210, 56212, 56213, 56226 - 56229
- →Trigger is a specially crafted PlanMaker document containing a malicious record type 0x8010; the parser trusts an unchecked length field from this record and performs an out-of-bounds 16-bit null write relative to a stack-allocated buffer — look for anomalous PlanMaker (.pmd/.pmv) files opened by the PlanMaker process. ↗
- →The vulnerable record type is 0x8010 within PlanMaker document files; detection logic should inspect document record headers for record type 0x8010 with a length value that exceeds the allocated buffer bounds. ↗
- →Exploitation requires user interaction — the victim must open a specially crafted document; monitor for PlanMaker (PlanMaker.exe) spawning unexpected child processes or exhibiting anomalous memory writes as a post-exploitation indicator. ↗
- ·Snort rules listed cover multiple CVEs in the same advisory (CVE-2020-13579, CVE-2020-13580, CVE-2020-13581, CVE-2020-13586); individual rule-to-CVE mapping is not specified in the source — verify rule SIDs against your FMC/Snort.org for CVE-2020-13580 specificity. ↗
- ·Confirmed affected version is SoftMaker Office PlanMaker 2021 Revision 1014 only; other revisions were not tested. ↗
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvdv3.08.8HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvdv2.06.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P
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Talos
Vulnerability Spotlight: Multiple vulnerabilities in SoftMaker Office PlanMaker
blogs_talos·2021-02-03·CVSS 7.8
[HIGH] Vulnerability Spotlight: Multiple vulnerabilities in SoftMaker Office PlanMaker
Discovered by a Cisco Talos researcher. Blog by Jon Munshaw.
SoftMaker's Office PlanMaker contains multiple vulnerabilities that could allow an adversary to cause a variety of malicious conditions in the software. SoftMaker's flagship product, SoftMaker Office, is supported on a variety of platforms and contains a handful of components that allows the user to write text documents, create spreadsheets, design presentations and more. The SoftMaker Office suite supports a variety of common office file formats, as well as other internal formats that the user may choose to use when performing their necessary work. These vulnerabilities all exist in the PlanMaker component of the suite, which allows users to create and edit spreadsheets.In accordance with our coordinated disclosure policy, Cisc
Talos
Vulnerability Spotlight: Multiple vulnerabilities in SoftMaker Office PlanMaker
blogs_talos·2021-02-03·CVSS 7.8
[HIGH] Vulnerability Spotlight: Multiple vulnerabilities in SoftMaker Office PlanMaker
## Vulnerability Spotlight: Multiple vulnerabilities in SoftMaker Office PlanMaker
Discovered by a Cisco Talos researcher. Blog by Jon Munshaw.
SoftMaker's Office PlanMaker contains multiple vulnerabilities that could allow an adversary to cause a variety of malicious conditions in the software. SoftMaker's flagship product, SoftMaker Office, is supported on a variety of platforms and contains a handful of components that allows the user to write text documents, create spreadsheets, design presentations and more. The SoftMaker Office suite supports a variety of common office file formats, as well as other internal formats that the user may choose to use when performing their necessary work. These vulnerabilities all exist in the PlanMaker component of the suite, which allows users to cre
2021-02-04
Published