Bug 1537043 (CVE-2018-1000035) - CVE-2018-1000035 unzip: Heap-based buffer overflow in fileio.c:UzpPassword function allows code execution
Summary: CVE-2018-1000035 unzip: Heap-based buffer overflow in fileio.c:UzpPassword fu...
Alias: CVE-2018-1000035
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1537044 1543337
Blocks: 1537057
TreeView+ depends on / blocked
Reported: 2018-01-22 10:33 UTC by Adam Mariš
Modified: 2021-02-17 00:56 UTC (History)
6 users (show)

Fixed In Version: unzip 6.1c23
Doc Type: If docs needed, set a value
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Clone Of:
Last Closed: 2019-06-08 03:37:49 UTC

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Description Adam Mariš 2018-01-22 10:33:50 UTC
Heap-based buffer overflow vulnerability in UzpPassword function was found, possibly allowing arbitrary code execution when uncompressing specially crafted password protected ZIP archives.

Vulnerable code:

[1591]  if ((prompt = (char *)malloc(2*FILNAMSIZ + 15)) != (char *)NULL) {
[1592]          sprintf(prompt, LoadFarString(PasswPrompt),
[1593]                                  FnFilter1(zfn), FnFilter2(efn));
[1595]  } 

The buffer can be overrun since the attacker can arbitrarily choose name for files residing inside archive file.

Comment 4 Adam Mariš 2018-01-22 12:48:01 UTC

Name: R. Freingruber (SEC Consult Vulnerability Lab)

Comment 5 Pedro Yóssis Silva Barbosa 2018-01-25 15:46:47 UTC

This issue affects the versions of unzip as shipped with Red Hat Enterprise Linux 5, 6 and 7. Red Hat Product Security has rated this issue as having Low security impact. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.

Comment 7 Adam Mariš 2018-02-08 09:45:03 UTC
Created unzip tracking bugs for this issue:

Affects: fedora-all [bug 1543337]

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