CVSS: 8.1EPSS: 1%CPEs: 8EXPL: 0CVE-2021-20305 – nettle: Out of bounds memory access in signature verification
https://notcve.org/view.php?id=CVE-2021-20305
A flaw was found in Nettle in versions before 3.7.2, where several Nettle signature verification functions (GOST DSA, EDDSA & ECDSA) result in the Elliptic Curve Cryptography point (ECC) multiply function being called with out-of-range scalers, possibly resulting in incorrect results. This flaw allows an attacker to force an invalid signature, causing an assertion failure or possible validation. The highest threat to this vulnerability is to confidentiality, integrity, as well as system availability. Se encontró un fallo en Nettle en versiones anteriores a 3.7.2, donde varias funciones de comprobación de firma de Nettle (GOST DSA, EDDSA y ECDSA) resultan en la función de multiplicación del punto Elliptic Curve Cryptography (ECC) ser llamados con escaladores fuera de rango, posiblemente resultando en resultados incorrectos. Este fallo permite a un atacante forzar una firma no válida, causando un fallo de aserción o una posible validación. • https://bugzilla.redhat.com/show_bug.cgi?id=1942533 https://lists.debian.org/debian-lts-announce/2021/09/msg00008.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQKWVVMAIDAJ7YAA3VVO32BHLDOH2E63 https://security.gentoo.org/glsa/202105-31 https://security.netapp.com/advisory/ntap-20211022-0002 https://www.debian.org/security/2021/dsa-4933 https://access.redhat.com/security/cve/CVE-2021-20305 • CWE-327: Use of a Broken or Risky Cryptographic Algorithm CWE-787: Out-of-bounds Write •
CVSS: 5.7EPSS: 0%CPEs: 4EXPL: 0CVE-2021-3409
https://notcve.org/view.php?id=CVE-2021-3409
The patch for CVE-2020-17380/CVE-2020-25085 was found to be ineffective, thus making QEMU vulnerable to the out-of-bounds read/write access issues previously found in the SDHCI controller emulation code. This flaw allows a malicious privileged guest to crash the QEMU process on the host, resulting in a denial of service or potential code execution. QEMU up to (including) 5.2.0 is affected by this. Se detectó que el parche para CVE-2020-17380/CVE-2020-25085 era ineficaz, por lo que QEMU era vulnerable a problemas de acceso de lectura y escritura fuera de límites que se encontraban anteriormente en el código de emulación del controlador SDHCI. Este fallo permite a un invitado privilegiado malicioso bloquear el proceso QEMU en el host, resultando en una denegación de servicio o una posible ejecución de código. • https://bugzilla.redhat.com/show_bug.cgi?id=1928146 https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html https://security.gentoo.org/glsa/202208-27 https://security.netapp.com/advisory/ntap-20210507-0001 https://www.openwall.com/lists/oss-security/2021/03/09/1 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer •
CVSS: 6.0EPSS: 0%CPEs: 8EXPL: 0CVE-2021-3416 – QEMU: net: Infinite loop in loopback mode may lead to stack overflow
https://notcve.org/view.php?id=CVE-2021-3416
A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the host resulting in DoS scenario. Se encontró un posible desbordamiento de la pila por medio de un problema de bucle infinito en varios emuladores de NIC de QEMU en versiones hasta 5.2.0 incluyéndola. El problema ocurre en el modo loopback de una NIC en donde son omitidas las comprobaciones DMA reentrantes. • https://bugzilla.redhat.com/show_bug.cgi?id=1932827 https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html https://security.gentoo.org/glsa/202208-27 https://security.netapp.com/advisory/ntap-20210507-0002 https://www.openwall.com/lists/oss-security/2021/02/26/1 https://access.redhat.com/security/cve/CVE-2021-3416 • CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') •
CVSS: 7.8EPSS: 0%CPEs: 9EXPL: 0CVE-2020-35524 – libtiff: Heap-based buffer overflow in TIFF2PDF tool
https://notcve.org/view.php?id=CVE-2020-35524
A heap-based buffer overflow flaw was found in libtiff in the handling of TIFF images in libtiff's TIFF2PDF tool. A specially crafted TIFF file can lead to arbitrary code execution. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. Se encontró un error de desbordamiento de búfer en la región heap de la memoria en libtiff en el manejo de imágenes TIFF en la herramienta TIFF2PDF de libtiff. Un archivo TIFF especialmente diseñado puede conllevar a una ejecución de código arbitraria. • https://bugzilla.redhat.com/show_bug.cgi?id=1932044 https://gitlab.com/libtiff/libtiff/-/merge_requests/159 https://gitlab.com/rzkn/libtiff/-/commit/7be2e452ddcf6d7abca88f41d3761e6edab72b22 https://lists.debian.org/debian-lts-announce/2021/06/msg00023.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BMHBYFMX3D5VGR6Y3RXTTH3Q4NF4E6IG https://security.gentoo.org/glsa/202104-06 https://security.netapp.com/advisory/ntap-20210521-0009 https://www.debian.org/se • CWE-787: Out-of-bounds Write •
CVSS: 7.5EPSS: 0%CPEs: 10EXPL: 0CVE-2021-20270 – python-pygments: Infinite loop in SML lexer may lead to DoS
https://notcve.org/view.php?id=CVE-2021-20270
An infinite loop in SMLLexer in Pygments versions 1.5 to 2.7.3 may lead to denial of service when performing syntax highlighting of a Standard ML (SML) source file, as demonstrated by input that only contains the "exception" keyword. Un bucle infinito en SMLLexer en Pygments versiones 1.5 hasta 2.7.3, puede conllevar a una denegación de servicio cuando se lleva a cabo el resaltado de sintaxis de un archivo fuente de Standard ML (SML), como es demostrado por la entrada que solo contiene la palabra clave "exception" • https://bugzilla.redhat.com/show_bug.cgi?id=1922136 https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html https://www.debian.org/security/2021/dsa-4889 https://www.oracle.com/security-alerts/cpuoct2021.html https://access.redhat.com/security/cve/CVE-2021-20270 • CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') •