Ubuntu.comUB:CVE-2024-26752CVE-2024-26752
In the Linux kernel, the following vulnerability has been resolved: l2tp:
pass correct message length to ip6_append_data l2tp_ip6_sendmsg needs to
avoid accounting for the transport header twice when splicing more data
into an already partially-occupied skbuff. To manage this, we check whether
the skbuff contains data using skb_queue_empty when deciding how much data
to append using ip6_append_data. However, the code which performed the
calculation was incorrect: ulen = len +
skb_queue_empty(&sk->sk_write_queue) ? transhdrlen : 0; …due to C
operator precedence, this ends up setting ulen to transhdrlen for messages
with a non-zero length, which results in corrupted packets on the wire. Add
parentheses to correct the calculation in line with the original intent.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 20.04 | noarch | linux | < 5.4.0-186.206 | UNKNOWN |
| ubuntu | 22.04 | noarch | linux | < 5.15.0-112.122 | UNKNOWN |
| ubuntu | 23.10 | noarch | linux | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-aws | < 5.4.0-1126.136 | UNKNOWN |
| ubuntu | 22.04 | noarch | linux-aws | < 5.15.0-1063.69 | UNKNOWN |
| ubuntu | 23.10 | noarch | linux-aws | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-aws-5.15 | < 5.15.0-1063.69~20.04.1 | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-aws-5.4 | < 5.4.0-1126.136~18.04.1 | UNKNOWN |
| ubuntu | 22.04 | noarch | linux-aws-6.5 | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-azure | < 5.4.0-1131.138 | UNKNOWN |
References
git.kernel.org/linus/359e54a93ab43d32ee1bff3c2f9f10cb9f6b6e79 (6.8-rc6)
git.kernel.org/stable/c/0da15a70395182ee8cb75716baf00dddc0bea38d
git.kernel.org/stable/c/13cd1daeea848614e585b2c6ecc11ca9c8ab2500
git.kernel.org/stable/c/359e54a93ab43d32ee1bff3c2f9f10cb9f6b6e79
git.kernel.org/stable/c/4c3ce64bc9d36ca9164dd6c77ff144c121011aae
git.kernel.org/stable/c/804bd8650a3a2bf3432375f8c97d5049d845ce56
git.kernel.org/stable/c/83340c66b498e49353530e41542500fc8a4782d6
git.kernel.org/stable/c/c1d3a84a67db910ce28a871273c992c3d7f9efb5
git.kernel.org/stable/c/dcb4d14268595065c85dc5528056713928e17243
launchpad.net/bugs/cve/CVE-2024-26752
nvd.nist.gov/vuln/detail/CVE-2024-26752
security-tracker.debian.org/tracker/CVE-2024-26752
ubuntu.com/security/notices/USN-6820-1
ubuntu.com/security/notices/USN-6820-2
ubuntu.com/security/notices/USN-6821-1
ubuntu.com/security/notices/USN-6821-2
ubuntu.com/security/notices/USN-6821-3
ubuntu.com/security/notices/USN-6821-4
ubuntu.com/security/notices/USN-6828-1
ubuntu.com/security/notices/USN-6831-1
www.cve.org/CVERecord?id=CVE-2024-26752
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