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Old version of Zlib in GnuPG
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Description

There are two directories where the library is included:
APPDIR/GnuPG/bin/Zlib1.dll (version of Zlib is here 1.2.8)
APPDIR/Gpg4win/bin/Zlib1.dll (version of Zlib is here 1.2.11)

For version 1.2.8 two CVEs are known: CVE-2016-9842 (CVSS 8.8) and CVE-2016-9841 (CVSS 9.8).

Accordingly to @aheinecke the use of Zlib is strongly limited, so these CVEs are not relevant for GnuPG.

Details

External Link
https://www.openwall.com/lists/oss-security/2016/12/05/21
Version
4.0.0

Related Objects

Event Timeline

cklassen created this task.Mar 15 2022, 11:59 AM
cklassen created this object in space S1 Public.
bernhard added a subscriber: bernhard.Mar 15 2022, 12:23 PM
cklassen updated the task description. (Show Details)Mar 15 2022, 12:55 PM
cklassen edited projects, added gpg4win; removed gnupg.
cklassen set Version to 4.0.0.
cklassen added a subscriber: aheinecke.
• werner triaged this task as Low priority.Mar 15 2022, 1:01 PM
• werner added a subscriber: • werner.

Right, we are not affected by these CVE because we use only the very basic core in gpg and no higher level functions. At least for GnuPG there will be no update.

• werner set External Link to https://www.openwall.com/lists/oss-security/2016/12/05/21.Mar 15 2022, 3:17 PM
• werner raised the priority of this task from Low to Normal.Mar 15 2022, 3:22 PM
• werner added projects: gnupg (gpg22), CVE.

All 4 CVEs are findings related to standard conforming compiler optimizations which OTOH break long standing assumptions on C coding. “Let us show that our compiler produces the fastes code ever and ignore any assumptions coders had made over the last 50 year”.

I recall that I looked at them but it turned out that these fixes introduced other bugs. Well, things might have settled by now and thus we could update our zlib version.

• werner closed this task as Resolved.Mar 17 2022, 8:04 AM
• werner claimed this task.

SWDB updated - thus the latest zlib will be part of the next Windows build.

bernhard mentioned this in T5910: CVE-2018-25032 for zlib <=1.2.11 (CVSS 8.1 high).Mar 30 2022, 4:53 PM