PSF-2019-4: Critical severity Bzip2 bzip2 vulnerability

Q: Which deployments are exposed?

Deployments using bzip2 through version 1.0.6 are affected when they decompress bzip2 data. Exposure is particularly relevant where untrusted or attacker-supplied compressed input can reach the decompression function.

Q: What does an attacker need to exploit this issue?

The attacker needs to cause processing of a bzip2 stream containing many selectors. The supplied vector indicates network exploitation is possible without privileges or user interaction, with potential high impact to confidentiality, integrity, and availability.

Published Jun 19, 2019

Updated

BZ2decompress in decompress.c in bzip2 through 1.0.6 has an out-of-bounds write when there are many selectors.

Affected Software

1 affected component

Bzip2 bzip2<=1.0.6

Event History

Jun 19, 2019

CVE Published

via OSV·11:15 PM

Data Sourced

via OSV·11:15 PM

DescriptionSeverity

Frequently Asked Questions

Which deployments are exposed?

Deployments using bzip2 through version 1.0.6 are affected when they decompress bzip2 data. Exposure is particularly relevant where untrusted or attacker-supplied compressed input can reach the decompression function.

What does an attacker need to exploit this issue?

The attacker needs to cause processing of a bzip2 stream containing many selectors. The supplied vector indicates network exploitation is possible without privileges or user interaction, with potential high impact to confidentiality, integrity, and availability.

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