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osvGoogleOSV:GHSA-25XM-HR59-7C27
HistoryMay 25, 2021 - 6:39 p.m.

github.com/ulikunitz/xz fixes readUvarint denial of service

2021-05-2518:39:37
Google
osv.dev
11

7.5 High

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

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

0.054 Low

EPSS

Percentile

93.1%

Impact

xz is a compression and decompression library focusing on the xz format completely written in Go. The function readUvarint used to read the xz container format may not terminate a loop provide malicous input.

Patches

The problem has been fixed in release v0.5.8.

Workarounds

Limit the size of the compressed file input to a reasonable size for your use case.

References

The standard library had recently the same issue and got the CVE-2020-16845 allocated.

For more information

If you have any questions or comments about this advisory:

  • Open an issue in xz.
CPENameOperatorVersion
github.com/ulikunitz/xzlt0.5.8

7.5 High

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

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

0.054 Low

EPSS

Percentile

93.1%