Vulnerability Monitor

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CVE-2020-25725

In Xpdf 4.02, SplashOutputDev::endType3Char(GfxState *state) SplashOutputDev.cc:3079 is trying to use the freed `t3GlyphStack->cache`, which causes an `heap-use-after-free` problem. The codes of a previous fix for nested Type 3 characters wasn't correctly handling the case where a Type 3 char referred to another char in the same Type 3 font.

Published

2020-11-21T06:15:12.240

Last Modified

2024-11-21T05:18:35.190

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.0 (MEDIUM)

CVSSv2 Vector

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

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-416
Type: Secondary
CWE-416

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	xpdfreader	xpdf	4.02	Yes
Operating System	fedoraproject	fedora	32	Yes
Operating System	fedoraproject	fedora	33	Yes

References

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-25725 Exploit, Issue Tracking, Third Party Advisory ([email protected])
https://forum.xpdfreader.com/viewtopic.php?f=3&t=41915 Exploit, Vendor Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ZUU5QG6SSVRTKZTR3A72LDRVZETEI63/ Mailing List, Third Party Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VLOYVJSM54IL6I5RY4QTJGRS7PIEG44X/ Mailing List, Third Party Advisory ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-25725 Exploit, Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://forum.xpdfreader.com/viewtopic.php?f=3&t=41915 Exploit, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ZUU5QG6SSVRTKZTR3A72LDRVZETEI63/ Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VLOYVJSM54IL6I5RY4QTJGRS7PIEG44X/ Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)