Bug 1569233 (CVE-2018-9860) - CVE-2018-9860 botan: off-by-one error when processing malformed TLS-CBC ciphertext
Summary: CVE-2018-9860 botan: off-by-one error when processing malformed TLS-CBC ciphe...
Keywords:
Status: NEW
Alias: CVE-2018-9860
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-04-18 20:43 UTC by Laura Pardo
Modified: 2019-09-29 14:37 UTC (History)
1 user (show)

Fixed In Version: botan 2.6.0
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Description Laura Pardo 2018-04-18 20:43:46 UTC
A flaw was found in Botan 1.11.32 through 2.x before 2.6.0. An off-by-one error when processing malformed TLS-CBC ciphertext could cause the receiving side to include in the HMAC computation exactly 64K bytes of data following the record buffer, aka an over-read. The MAC comparison will subsequently fail and the connection will be closed. This could be used for denial of service. No information leak occurs.


Reference:
https://botan.randombit.net/security.html

Comment 1 Thomas Moschny 2018-04-18 21:42:31 UTC
In the botan package, we only package stable 1.X versions up to and including 1.10.

The botan2 package contains stable 2.X versions. Moreover, 2.6.0 is already in rawhide, and in testing for F27 and F28.


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