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Bug 1378344 - (CVE-2016-7045) CVE-2016-7045 irssi: String length not validated in format_send_to_gui() causing crash
CVE-2016-7045 irssi: String length not validated in format_send_to_gui() caus...
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20160921,repor...
: Security
Depends On: 1378345 1378346
Blocks: 1378349
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Reported: 2016-09-22 04:22 EDT by Adam Mariš
Modified: 2016-09-27 05:51 EDT (History)
4 users (show)

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Fixed In Version: irssi 0.8.20
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Last Closed: 2016-09-27 05:51:46 EDT
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Description Adam Mariš 2016-09-22 04:22:29 EDT 
A vulnerability in irssi was found caused by improper input checking allowing remote attacker to cause application crash.

The format_send_to_gui() function does not validate the length of the string before incrementing the `ptr' pointer in all cases. If that happens, the pointer `ptr' can be incremented twice and thus end past the boundaries of the original `dup' buffer.

Affected versions: Irssi 0.8.17-beta up to and including 0.8.19 up to 0.8.19-219-g52fedea

External Reference:

https://irssi.org/security/irssi_sa_2016.txt
Comment 1 Adam Mariš 2016-09-22 04:23:39 EDT 
Created irssi tracking bugs for this issue:

Affects: fedora-all [bug 1378345]
Affects: epel-5 [bug 1378346]
Comment 6 Cedric Buissart 2016-09-27 05:50:33 EDT 
As shipped in RHEL-6, RHEL-7 or EPEL-5, the ptr pointer can not overflow. These products are not affected by this flaw.
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