Bug 1224842 (CVE-2021-47241)

Summary:	VUL-0: CVE-2021-47241: kernel: ethtool: strset: fix message length calculation
Product:	[Novell Products] SUSE Security Incidents	Reporter:	SMASH SMASH <smash_bz>
Component:	Incidents	Assignee:	Security Team bot <security-team>
Status:	RESOLVED FIXED	QA Contact:	Security Team bot <security-team>
Severity:	Normal
Priority:	P3 - Medium	CC:	gabriele.sonnu, mhocko, mkubecek
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/406869/
Whiteboard:	CVSSv3.1:SUSE:CVE-2021-47241:5.5:(AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description SMASH SMASH 2024-05-22 08:09:48 UTC

In the Linux kernel, the following vulnerability has been resolved:

ethtool: strset: fix message length calculation

Outer nest for ETHTOOL_A_STRSET_STRINGSETS is not accounted for.
This may result in ETHTOOL_MSG_STRSET_GET producing a warning like:

    calculated message payload length (684) not sufficient
    WARNING: CPU: 0 PID: 30967 at net/ethtool/netlink.c:369 ethnl_default_doit+0x87a/0xa20

and a splat.

As usually with such warnings three conditions must be met for the warning
to trigger:
 - there must be no skb size rounding up (e.g. reply_size of 684);
 - string set must be per-device (so that the header gets populated);
 - the device name must be at least 12 characters long.

all in all with current user space it looks like reading priv flags
is the only place this could potentially happen. Or with syzbot :)

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47241
https://www.cve.org/CVERecord?id=CVE-2021-47241
https://git.kernel.org/stable/c/cfc7f0e70d649e6d2233fba0d9390b525677d971
https://git.kernel.org/stable/c/e175aef902697826d344ce3a12189329848fe898
https://git.kernel.org/stable/c/fb3a948143688e14e2cfd2a2812877923d0e5e92
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2021/CVE-2021-47241.mbox

Comment 1 Michal Hocko 2024-05-23 14:14:14 UTC

The security aspect of this CVE is WARNING which would panic when configured panic_on_warn. So from that perspective this is a non-issue with our default configuration. Bouncing back to the security team.

Comment 5 Andrea Mattiazzo 2024-06-07 12:17:47 UTC

All done, closing.

Comment 7 Maintenance Automation 2024-06-12 20:31:43 UTC

SUSE-SU-2024:2010-1: An update that solves 186 vulnerabilities and has 27 security fixes can now be installed.

Category: security (important)
Bug References: 1065729, 1151927, 1152472, 1154353, 1156395, 1174585, 1176447, 1176774, 1176869, 1178134, 1181147, 1184631, 1185589, 1185902, 1186885, 1188616, 1188772, 1189883, 1190795, 1191452, 1192107, 1194288, 1194591, 1196956, 1197760, 1198029, 1199304, 1200619, 1203389, 1206646, 1209657, 1210335, 1210629, 1213476, 1215420, 1216702, 1217169, 1220137, 1220144, 1220754, 1220877, 1220960, 1221044, 1221113, 1221829, 1222251, 1222619, 1222838, 1222867, 1223084, 1223138, 1223384, 1223390, 1223512, 1223626, 1223715, 1223932, 1223934, 1224099, 1224174, 1224438, 1224482, 1224511, 1224592, 1224816, 1224826, 1224830, 1224831, 1224832, 1224834, 1224841, 1224842, 1224843, 1224844, 1224846, 1224849, 1224852, 1224853, 1224854, 1224859, 1224882, 1224886, 1224888, 1224889, 1224891, 1224892, 1224893, 1224899, 1224904, 1224907, 1224909, 1224916, 1224917, 1224922, 1224923, 1224924, 1224926, 1224928, 1224953, 1224954, 1224955, 1224957, 1224961, 1224963, 1224965, 1224966, 1224968, 1224981, 1224982, 1224983, 1224984, 1224987, 1224990, 1224993, 1224996, 1224997, 1225026, 1225030, 1225058, 1225060, 1225083, 1225084, 1225091, 1225112, 1225113, 1225128, 1225140, 1225143, 1225148, 1225155, 1225164, 1225177, 1225178, 1225181, 1225192, 1225193, 1225198, 1225201, 1225206, 1225207, 1225208, 1225214, 1225223, 1225224, 1225230, 1225232, 1225233, 1225237, 1225238, 1225243, 1225244, 1225247, 1225251, 1225252, 1225256, 1225261, 1225262, 1225263, 1225301, 1225303, 1225316, 1225318, 1225320, 1225321, 1225322, 1225326, 1225327, 1225328, 1225330, 1225333, 1225336, 1225341, 1225346, 1225351, 1225354, 1225355, 1225357, 1225358, 1225360, 1225361, 1225366, 1225367, 1225369, 1225370, 1225372, 1225374, 1225384, 1225386, 1225387, 1225390, 1225393, 1225400, 1225404, 1225405, 1225409, 1225411, 1225424, 1225427, 1225435, 1225437, 1225438, 1225439, 1225446, 1225447, 1225448, 1225450, 1225453, 1225455, 1225468, 1225499, 1225500, 1225508, 1225534
CVE References: CVE-2020-36788, CVE-2021-3743, CVE-2021-39698, CVE-2021-43056, CVE-2021-47104, CVE-2021-47192, CVE-2021-47200, CVE-2021-47220, CVE-2021-47227, CVE-2021-47228, CVE-2021-47229, CVE-2021-47230, CVE-2021-47231, CVE-2021-47235, CVE-2021-47236, CVE-2021-47237, CVE-2021-47239, CVE-2021-47240, CVE-2021-47241, CVE-2021-47246, CVE-2021-47252, CVE-2021-47253, CVE-2021-47254, CVE-2021-47255, CVE-2021-47258, CVE-2021-47259, CVE-2021-47260, CVE-2021-47261, CVE-2021-47263, CVE-2021-47265, CVE-2021-47267, CVE-2021-47269, CVE-2021-47270, CVE-2021-47274, CVE-2021-47275, CVE-2021-47276, CVE-2021-47280, CVE-2021-47281, CVE-2021-47284, CVE-2021-47285, CVE-2021-47288, CVE-2021-47289, CVE-2021-47296, CVE-2021-47301, CVE-2021-47302, CVE-2021-47305, CVE-2021-47307, CVE-2021-47308, CVE-2021-47314, CVE-2021-47315, CVE-2021-47320, CVE-2021-47321, CVE-2021-47323, CVE-2021-47324, CVE-2021-47329, CVE-2021-47330, CVE-2021-47332, CVE-2021-47333, CVE-2021-47334, CVE-2021-47337, CVE-2021-47338, CVE-2021-47340, CVE-2021-47341, CVE-2021-47343, CVE-2021-47344, CVE-2021-47347, CVE-2021-47348, CVE-2021-47350, CVE-2021-47353, CVE-2021-47354, CVE-2021-47356, CVE-2021-47369, CVE-2021-47375, CVE-2021-47378, CVE-2021-47381, CVE-2021-47382, CVE-2021-47383, CVE-2021-47387, CVE-2021-47388, CVE-2021-47391, CVE-2021-47392, CVE-2021-47393, CVE-2021-47395, CVE-2021-47396, CVE-2021-47399, CVE-2021-47402, CVE-2021-47404, CVE-2021-47405, CVE-2021-47409, CVE-2021-47413, CVE-2021-47416, CVE-2021-47422, CVE-2021-47423, CVE-2021-47424, CVE-2021-47425, CVE-2021-47426, CVE-2021-47428, CVE-2021-47431, CVE-2021-47434, CVE-2021-47435, CVE-2021-47436, CVE-2021-47441, CVE-2021-47442, CVE-2021-47443, CVE-2021-47444, CVE-2021-47445, CVE-2021-47451, CVE-2021-47456, CVE-2021-47458, CVE-2021-47460, CVE-2021-47464, CVE-2021-47465, CVE-2021-47468, CVE-2021-47473, CVE-2021-47478, CVE-2021-47480, CVE-2021-47482, CVE-2021-47483, CVE-2021-47485, CVE-2021-47493, CVE-2021-47494, CVE-2021-47495, CVE-2021-47496, CVE-2021-47497, CVE-2021-47498, CVE-2021-47499, CVE-2021-47500, CVE-2021-47501, CVE-2021-47502, CVE-2021-47503, CVE-2021-47505, CVE-2021-47506, CVE-2021-47507, CVE-2021-47509, CVE-2021-47511, CVE-2021-47512, CVE-2021-47516, CVE-2021-47518, CVE-2021-47521, CVE-2021-47522, CVE-2021-47523, CVE-2021-47527, CVE-2021-47535, CVE-2021-47536, CVE-2021-47538, CVE-2021-47540, CVE-2021-47541, CVE-2021-47542, CVE-2021-47549, CVE-2021-47557, CVE-2021-47562, CVE-2021-47563, CVE-2021-47565, CVE-2022-1195, CVE-2022-20132, CVE-2022-48636, CVE-2022-48673, CVE-2022-48704, CVE-2022-48710, CVE-2023-0160, CVE-2023-1829, CVE-2023-2176, CVE-2023-4244, CVE-2023-47233, CVE-2023-52433, CVE-2023-52581, CVE-2023-52591, CVE-2023-52654, CVE-2023-52655, CVE-2023-52686, CVE-2023-52840, CVE-2023-52871, CVE-2023-52880, CVE-2023-6531, CVE-2024-26581, CVE-2024-26643, CVE-2024-26828, CVE-2024-26921, CVE-2024-26925, CVE-2024-26929, CVE-2024-26930, CVE-2024-27398, CVE-2024-27413, CVE-2024-35811, CVE-2024-35895, CVE-2024-35914
Maintenance Incident: [SUSE:Maintenance:34219](https://smelt.suse.de/incident/34219/)
Sources used:
SUSE Linux Enterprise Micro 5.1 (src):
 kernel-source-rt-5.3.18-150300.172.1
SUSE Linux Enterprise Micro 5.2 (src):
 kernel-source-rt-5.3.18-150300.172.1
SUSE Linux Enterprise Micro for Rancher 5.2 (src):
 kernel-source-rt-5.3.18-150300.172.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

Comment 8 Maintenance Automation 2024-06-24 20:32:10 UTC

SUSE-SU-2024:2185-1: An update that solves 187 vulnerabilities and has 26 security fixes can now be installed.

Category: security (important)
Bug References: 1065729, 1151927, 1152472, 1154353, 1156395, 1174585, 1176447, 1176774, 1176869, 1178134, 1181147, 1184631, 1185570, 1185589, 1185902, 1186885, 1187357, 1188616, 1188772, 1189883, 1190795, 1191452, 1192107, 1194288, 1194591, 1196956, 1197760, 1198029, 1199304, 1200619, 1203389, 1206646, 1209657, 1210335, 1210629, 1213476, 1215420, 1216702, 1217169, 1220137, 1220144, 1220754, 1220877, 1220960, 1221044, 1221113, 1221829, 1222251, 1222619, 1222838, 1222867, 1223084, 1223138, 1223384, 1223390, 1223512, 1223932, 1223934, 1224099, 1224174, 1224438, 1224482, 1224511, 1224592, 1224816, 1224826, 1224830, 1224831, 1224832, 1224834, 1224841, 1224842, 1224843, 1224844, 1224846, 1224849, 1224852, 1224853, 1224854, 1224859, 1224882, 1224886, 1224888, 1224889, 1224891, 1224892, 1224893, 1224899, 1224904, 1224907, 1224909, 1224916, 1224917, 1224922, 1224923, 1224924, 1224926, 1224928, 1224953, 1224954, 1224955, 1224957, 1224961, 1224963, 1224965, 1224966, 1224968, 1224981, 1224982, 1224983, 1224984, 1224987, 1224990, 1224993, 1224996, 1224997, 1225026, 1225030, 1225058, 1225060, 1225083, 1225084, 1225091, 1225112, 1225113, 1225128, 1225140, 1225143, 1225148, 1225155, 1225164, 1225177, 1225178, 1225181, 1225192, 1225193, 1225198, 1225201, 1225206, 1225207, 1225208, 1225214, 1225223, 1225224, 1225230, 1225232, 1225233, 1225237, 1225238, 1225243, 1225244, 1225247, 1225251, 1225252, 1225256, 1225261, 1225262, 1225263, 1225301, 1225303, 1225316, 1225318, 1225320, 1225321, 1225322, 1225326, 1225327, 1225328, 1225330, 1225333, 1225336, 1225341, 1225346, 1225351, 1225354, 1225355, 1225357, 1225358, 1225360, 1225361, 1225366, 1225367, 1225369, 1225370, 1225372, 1225374, 1225384, 1225386, 1225387, 1225390, 1225393, 1225400, 1225404, 1225405, 1225409, 1225411, 1225424, 1225427, 1225435, 1225437, 1225438, 1225439, 1225446, 1225447, 1225448, 1225450, 1225453, 1225455, 1225468, 1225499, 1225500, 1225508, 1225534
CVE References: CVE-2020-36788, CVE-2021-3743, CVE-2021-39698, CVE-2021-43056, CVE-2021-47104, CVE-2021-47192, CVE-2021-47200, CVE-2021-47220, CVE-2021-47227, CVE-2021-47228, CVE-2021-47229, CVE-2021-47230, CVE-2021-47231, CVE-2021-47235, CVE-2021-47236, CVE-2021-47237, CVE-2021-47239, CVE-2021-47240, CVE-2021-47241, CVE-2021-47246, CVE-2021-47252, CVE-2021-47253, CVE-2021-47254, CVE-2021-47255, CVE-2021-47258, CVE-2021-47259, CVE-2021-47260, CVE-2021-47261, CVE-2021-47263, CVE-2021-47265, CVE-2021-47267, CVE-2021-47269, CVE-2021-47270, CVE-2021-47274, CVE-2021-47275, CVE-2021-47276, CVE-2021-47280, CVE-2021-47281, CVE-2021-47284, CVE-2021-47285, CVE-2021-47288, CVE-2021-47289, CVE-2021-47296, CVE-2021-47301, CVE-2021-47302, CVE-2021-47305, CVE-2021-47307, CVE-2021-47308, CVE-2021-47314, CVE-2021-47315, CVE-2021-47320, CVE-2021-47321, CVE-2021-47323, CVE-2021-47324, CVE-2021-47329, CVE-2021-47330, CVE-2021-47332, CVE-2021-47333, CVE-2021-47334, CVE-2021-47337, CVE-2021-47338, CVE-2021-47340, CVE-2021-47341, CVE-2021-47343, CVE-2021-47344, CVE-2021-47347, CVE-2021-47348, CVE-2021-47350, CVE-2021-47353, CVE-2021-47354, CVE-2021-47356, CVE-2021-47369, CVE-2021-47375, CVE-2021-47378, CVE-2021-47381, CVE-2021-47382, CVE-2021-47383, CVE-2021-47387, CVE-2021-47388, CVE-2021-47391, CVE-2021-47392, CVE-2021-47393, CVE-2021-47395, CVE-2021-47396, CVE-2021-47399, CVE-2021-47402, CVE-2021-47404, CVE-2021-47405, CVE-2021-47409, CVE-2021-47413, CVE-2021-47416, CVE-2021-47422, CVE-2021-47423, CVE-2021-47424, CVE-2021-47425, CVE-2021-47426, CVE-2021-47428, CVE-2021-47431, CVE-2021-47434, CVE-2021-47435, CVE-2021-47436, CVE-2021-47441, CVE-2021-47442, CVE-2021-47443, CVE-2021-47444, CVE-2021-47445, CVE-2021-47451, CVE-2021-47456, CVE-2021-47458, CVE-2021-47460, CVE-2021-47464, CVE-2021-47465, CVE-2021-47468, CVE-2021-47473, CVE-2021-47478, CVE-2021-47480, CVE-2021-47482, CVE-2021-47483, CVE-2021-47485, CVE-2021-47493, CVE-2021-47494, CVE-2021-47495, CVE-2021-47496, CVE-2021-47497, CVE-2021-47498, CVE-2021-47499, CVE-2021-47500, CVE-2021-47501, CVE-2021-47502, CVE-2021-47503, CVE-2021-47505, CVE-2021-47506, CVE-2021-47507, CVE-2021-47509, CVE-2021-47511, CVE-2021-47512, CVE-2021-47516, CVE-2021-47518, CVE-2021-47521, CVE-2021-47522, CVE-2021-47523, CVE-2021-47527, CVE-2021-47535, CVE-2021-47536, CVE-2021-47538, CVE-2021-47540, CVE-2021-47541, CVE-2021-47542, CVE-2021-47549, CVE-2021-47557, CVE-2021-47562, CVE-2021-47563, CVE-2021-47565, CVE-2022-1195, CVE-2022-20132, CVE-2022-48636, CVE-2022-48673, CVE-2022-48704, CVE-2022-48710, CVE-2023-0160, CVE-2023-1829, CVE-2023-2176, CVE-2023-424, CVE-2023-4244, CVE-2023-47233, CVE-2023-52433, CVE-2023-52581, CVE-2023-52591, CVE-2023-52654, CVE-2023-52655, CVE-2023-52686, CVE-2023-52840, CVE-2023-52871, CVE-2023-52880, CVE-2023-6531, CVE-2024-26581, CVE-2024-26643, CVE-2024-26828, CVE-2024-26921, CVE-2024-26925, CVE-2024-26929, CVE-2024-26930, CVE-2024-27398, CVE-2024-27413, CVE-2024-35811, CVE-2024-35895, CVE-2024-35914
Maintenance Incident: [SUSE:Maintenance:34168](https://smelt.suse.de/incident/34168/)
Sources used:
openSUSE Leap 15.3 (src):
 kernel-obs-build-5.3.18-150300.59.164.1, kernel-syms-5.3.18-150300.59.164.1, kernel-default-base-5.3.18-150300.59.164.1.150300.18.96.1, kernel-livepatch-SLE15-SP3_Update_45-1-150300.7.3.1, kernel-source-5.3.18-150300.59.164.1, kernel-obs-qa-5.3.18-150300.59.164.1
SUSE Linux Enterprise Live Patching 15-SP3 (src):
 kernel-livepatch-SLE15-SP3_Update_45-1-150300.7.3.1
SUSE Linux Enterprise High Performance Computing LTSS 15 SP3 (src):
 kernel-obs-build-5.3.18-150300.59.164.1, kernel-source-5.3.18-150300.59.164.1, kernel-default-base-5.3.18-150300.59.164.1.150300.18.96.1, kernel-syms-5.3.18-150300.59.164.1
SUSE Linux Enterprise Server 15 SP3 LTSS 15-SP3 (src):
 kernel-obs-build-5.3.18-150300.59.164.1, kernel-source-5.3.18-150300.59.164.1, kernel-default-base-5.3.18-150300.59.164.1.150300.18.96.1, kernel-syms-5.3.18-150300.59.164.1
SUSE Linux Enterprise Server for SAP Applications 15 SP3 (src):
 kernel-obs-build-5.3.18-150300.59.164.1, kernel-source-5.3.18-150300.59.164.1, kernel-default-base-5.3.18-150300.59.164.1.150300.18.96.1, kernel-syms-5.3.18-150300.59.164.1
SUSE Enterprise Storage 7.1 (src):
 kernel-obs-build-5.3.18-150300.59.164.1, kernel-source-5.3.18-150300.59.164.1, kernel-default-base-5.3.18-150300.59.164.1.150300.18.96.1, kernel-syms-5.3.18-150300.59.164.1
SUSE Linux Enterprise Micro 5.1 (src):
 kernel-default-base-5.3.18-150300.59.164.1.150300.18.96.1
SUSE Linux Enterprise Micro 5.2 (src):
 kernel-default-base-5.3.18-150300.59.164.1.150300.18.96.1
SUSE Linux Enterprise Micro for Rancher 5.2 (src):
 kernel-default-base-5.3.18-150300.59.164.1.150300.18.96.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.