Bug 1984609 (CVE-2021-36978) - CVE-2021-36978 qpdf: heap-based buffer overflow in Pl_ASCII85Decoder::write() when a certain downstream write fails
Summary: CVE-2021-36978 qpdf: heap-based buffer overflow in Pl_ASCII85Decoder::write()...
Keywords:
Status: NEW
Alias: CVE-2021-36978
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Nobody
QA Contact:
URL:
Whiteboard:
Depends On: 1984610 1986720 1986721
Blocks: 1984611
TreeView+ depends on / blocked
 
Reported: 2021-07-21 18:35 UTC by Guilherme de Almeida Suckevicz
Modified: 2023-07-07 08:29 UTC (History)
2 users (show)

Fixed In Version: qpdf 10.1.0
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2021-07-22 12:05:57 UTC
Embargoed:

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Description Guilherme de Almeida Suckevicz 2021-07-21 18:35:33 UTC 
QPDF 9.x through 9.1.1 and 10.x through 10.0.4 has a heap-based buffer overflow in Pl_ASCII85Decoder::write (called from Pl_AES_PDF::flush and Pl_AES_PDF::finish) when a certain downstream write fails.

Reference:
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=28262

Upstream patch:
https://github.com/qpdf/qpdf/commit/dc92574c10f3e2516ec6445b88c5d584f40df4e5
Comment 1 Guilherme de Almeida Suckevicz 2021-07-21 18:35:50 UTC 
Created qpdf tracking bugs for this issue:

Affects: fedora-all [bug 1984610]
Comment 2 Zdenek Dohnal 2021-07-22 12:05:57 UTC 
Fixed in 10.1.0 and later, already covered by Fedora's qpdf.
Comment 3 Zdenek Dohnal 2021-07-22 12:16:06 UTC 
Sorry, the bad bug.
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