CVE-2023-3724
published 2023-07-17CVE-2023-3724: If a TLS 1.3 client gets neither a PSK (pre shared key) extension nor a KSE (key share extension) when connecting to a malicious server, a default predictable…
PriorityP347high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
EPSS
0.65%
47.2th percentile
If a TLS 1.3 client gets neither a PSK (pre shared key) extension nor a KSE (key share extension) when connecting to a malicious server, a default predictable buffer gets used for the IKM (Input Keying Material) value when generating the session master secret. Using a potentially known IKM value when generating the session master secret key compromises the key generated, allowing an eavesdropper to reconstruct it and potentially allowing access to or meddling with message contents in the session. This issue does not affect client validation of connected servers, nor expose private key information, but could result in an insecure TLS 1.3 session when not controlling both sides of the connection. wolfSSL recommends that TLS 1.3 client side users update the version of wolfSSL used.
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | wolfssl | < wolfssl 5.5.4-2+deb12u1 (bookworm) | wolfssl 5.5.4-2+deb12u1 (bookworm) |
| msrc | cbl2_libtiff_4.4.0-8_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_mariadb_10.6.9-3.cm2_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_2.0_arm | — | — |
| msrc | cbl_mariner_2.0_x64 | — | — |
| msrc | cm1_libtiff_4.5.0-1_on_cbl_mariner_1.0 | — | — |
| wolfssl | wolfssl | < 5.6.2 | 5.6.2 |
| wolfssl | wolfssl | >= 0 < 4.6.0+p1-0+deb11u2 | 4.6.0+p1-0+deb11u2 |
| wolfssl | wolfssl | >= 0 < 5.5.4-2+deb12u1 | 5.5.4-2+deb12u1 |
| wolfssl | wolfssl | >= 0 < 5.5.4-2.1 | 5.5.4-2.1 |
| wolfssl | wolfssl | >= 0 < 5.5.4-2.1 | 5.5.4-2.1 |
| wolfssl | wolfssl | 3.14.0 – 5.6.0 | — |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv8.8HIGH
vendor_debian9.1CRITICAL
vendor_msrc8.8HIGH
vendor_redhat6.8MEDIUM
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GHSA
GHSA-h4rv-393v-2f5h: If a TLS 1
ghsa_unreviewed·2023-07-18
CVE-2023-3724 [HIGH] CWE-20 GHSA-h4rv-393v-2f5h: If a TLS 1
If a TLS 1.3 client gets neither a PSK (pre shared key) extension nor a KSE (key share extension) when connecting to a malicious server, a default predictable buffer gets used for the IKM (Input Keying Material) value when generating the session master secret. Using a potentially known IKM value when generating the session master secret key compromises the key generated, allowing an eavesdropper to reconstruct it and potentially allowing access to or meddling with message contents in the session. This issue does not affect client validation of connected servers, nor expose private key information, but could result in an insecure TLS 1.3 session when not controlling both sides of the connection. wolfSSL recommends that TLS 1.3 client side users update the version of wolfSSL used.
OSV
CVE-2023-3724: If a TLS 1
osv·2023-07-17·CVSS 8.8
CVE-2023-3724 [HIGH] CVE-2023-3724: If a TLS 1
If a TLS 1.3 client gets neither a PSK (pre shared key) extension nor a KSE (key share extension) when connecting to a malicious server, a default predictable buffer gets used for the IKM (Input Keying Material) value when generating the session master secret. Using a potentially known IKM value when generating the session master secret key compromises the key generated, allowing an eavesdropper to reconstruct it and potentially allowing access to or meddling with message contents in the session. This issue does not affect client validation of connected servers, nor expose private key information, but could result in an insecure TLS 1.3 session when not controlling both sides of the connection. wolfSSL recommends that TLS 1.3 client side users update the version of wolfSSL used.
Microsoft
TLS 1.3 client issue handling malicious server when not including a KSE and PSK extension
vendor_msrc·2023-07-11·CVSS 8.8
CVE-2023-3724 [CRITICAL] CWE-20 TLS 1.3 client issue handling malicious server when not including a KSE and PSK extension
TLS 1.3 client issue handling malicious server when not including a KSE and PSK extension
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
wolfSSL Inc.: wolfSSL Inc.
Customer Action Required: Yes
Remediation
Microsoft
LibTIFF 4.4.0 has an out-of-bounds write in tiffcrop in tools/tiffcrop.c:3724 allowing attackers to cause a denial-of-service via a crafted tiff file. For users that compile libtiff from sources the f
vendor_msrc·2023-02-14·CVSS 5.5
CVE-2023-0802 [MEDIUM] CWE-787 LibTIFF 4.4.0 has an out-of-bounds write in tiffcrop in tools/tiffcrop.c:3724 allowing attackers to cause a denial-of-service via a crafted tiff file. For users that compile libtiff from sources the f
LibTIFF 4.4.0 has an out-of-bounds write in tiffcrop in tools/tiffcrop.c:3724 allowing attackers to cause a denial-of-service via a crafted tiff file. For users that compile libtiff from sources the fix is available with commit 33aee127.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional produ
Red Hat
libtiff: out-of-bounds write in extractContigSamplesShifted32bits() in tools/tiffcrop.c
vendor_redhat·2023-02-12·CVSS 6.8
CVE-2023-0802 [MEDIUM] CWE-787 libtiff: out-of-bounds write in extractContigSamplesShifted32bits() in tools/tiffcrop.c
libtiff: out-of-bounds write in extractContigSamplesShifted32bits() in tools/tiffcrop.c
LibTIFF 4.4.0 has an out-of-bounds write in tiffcrop in tools/tiffcrop.c:3724, allowing attackers to cause a denial-of-service via a crafted tiff file. For users that compile libtiff from sources, the fix is available with commit 33aee127.
A flaw was found in tiffcrop, a program distributed by the libtiff package. A specially crafted tiff file can lead to an out-of-bounds write in the extractContigSamplesShifted32bits function in tools/tiffcrop.c, resulting in a Denial of Service and limited data modification.
Package: libtiff (Red Hat Enterprise Linux 6) - Out of support scope
Package: compat-libtiff3 (Red Hat Enterprise Linux 7) - Out of support scope
Package: libtiff (Red Hat Enterprise Linux 7)
Debian
CVE-2023-3724: wolfssl - If a TLS 1.3 client gets neither a PSK (pre shared key) extension nor a KSE (key...
vendor_debian·2023·CVSS 9.1
CVE-2023-3724 [CRITICAL] CVE-2023-3724: wolfssl - If a TLS 1.3 client gets neither a PSK (pre shared key) extension nor a KSE (key...
If a TLS 1.3 client gets neither a PSK (pre shared key) extension nor a KSE (key share extension) when connecting to a malicious server, a default predictable buffer gets used for the IKM (Input Keying Material) value when generating the session master secret. Using a potentially known IKM value when generating the session master secret key compromises the key generated, allowing an eavesdropper to reconstruct it and potentially allowing access to or meddling with message contents in the session. This issue does not affect client validation of connected servers, nor expose private key information, but could result in an insecure TLS 1.3 session when not controlling both sides of the connection. wolfSSL recommends that TLS 1.3 client side users update the version of wolfSSL used.
Scope: loc
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2023-07-17
Published