CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
46.1%
This High severity org.xerial.snappy:snappy-java Dependency vulnerability was introduced in versions 7.21.0, 8.9.0 and 8.13.0 of Bitbucket Data Center and Server.
This org.xerial.snappy:snappy-java Dependency vulnerability, with a CVSS Score of 7.5 and a CVSS Vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H allows an unauthenticated attacker to expose assets in your environment susceptible to exploitation which has no impact to confidentiality, no impact to integrity, high impact to availability, and requires no user interaction.
Atlassian recommends that Bitbucket Data Center and Server customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions:
Bitbucket Data Center and Server 7.21: Upgrade to a release greater than or equal to 7.21.21
Bitbucket Data Center and Server 8.9: Upgrade to a release greater than or equal to 8.9.5
Bitbucket Data Center and Server 8.13: Upgrade to a release greater than or equal to 8.13.1
See the release notes ([https://confluence.atlassian.com/bitbucketserver/release-notes]). You can download the latest version of Bitbucket Data Center and Server from the download center ([https://www.atlassian.com/software/bitbucket/download-archives]).
The National Vulnerability Database provides the following description for this vulnerability: snappy-java is a fast compressor/decompressor for Java. Due to use of an unchecked chunk length, an unrecoverable fatal error can occur in versions prior to 1.1.10.1.
The code in the function hasNextChunk in the fileSnappyInputStream.java checks if a given stream has more chunks to read. It does that by attempting to read 4 bytes. If it wasnโt possible to read the 4 bytes, the function returns false. Otherwise, if 4 bytes were available, the code treats them as the length of the next chunk.
In the case that the compressed
variable is null, a byte array is allocated with the size given by the input data. Since the code doesnโt test the legality of the chunkSize
variable, it is possible to pass a negative number (such as 0xFFFFFFFF which is -1), which will cause the code to raise a java.lang.NegativeArraySizeException
exception. A worse case would happen when passing a huge positive value (such as 0x7FFFFFFF), which would raise the fatal java.lang.OutOfMemoryError
error.
Version 1.1.10.1 contains a patch for this issue.
Vendor | Product | Version | CPE |
---|---|---|---|
atlassian | bitbucket_data_center | * | cpe:2.3:a:atlassian:bitbucket_data_center:*:*:*:*:*:*:*:* |